105e627dcSAndy Fiddaman# tzdb data for South America and environs 205e627dcSAndy Fiddaman 3503609a9SYuri Pankov# This file is in the public domain, so clarified as of 4503609a9SYuri Pankov# 2009-05-17 by Arthur David Olson. 5503609a9SYuri Pankov 6503609a9SYuri Pankov# This file is by no means authoritative; if you think you know better, 7503609a9SYuri Pankov# go ahead and edit the file (and please send any changes to 8503609a9SYuri Pankov# tz@iana.org for general use in the future). For more, please see 9503609a9SYuri Pankov# the file CONTRIBUTING in the tz distribution. 10503609a9SYuri Pankov 11dafc4501SDan McDonald# From Paul Eggert (2016-12-05): 12503609a9SYuri Pankov# 13503609a9SYuri Pankov# Unless otherwise specified, the source for data through 1990 is: 14503609a9SYuri Pankov# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 15503609a9SYuri Pankov# San Diego: ACS Publications, Inc. (2003). 16503609a9SYuri Pankov# Unfortunately this book contains many errors and cites no sources. 17503609a9SYuri Pankov# 18dafc4501SDan McDonald# Many years ago Gwillim Law wrote that a good source 19dafc4501SDan McDonald# for time zone data was the International Air Transport 20503609a9SYuri Pankov# Association's Standard Schedules Information Manual (IATA SSIM), 21503609a9SYuri Pankov# published semiannually. Law sent in several helpful summaries 22503609a9SYuri Pankov# of the IATA's data after 1990. Except where otherwise noted, 23503609a9SYuri Pankov# IATA SSIM is the source for entries after 1990. 24503609a9SYuri Pankov# 25503609a9SYuri Pankov# For data circa 1899, a common source is: 26503609a9SYuri Pankov# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94. 27b654b02dSYuri Pankov# https://www.jstor.org/stable/1774359 28503609a9SYuri Pankov# 29dafc4501SDan McDonald# These tables use numeric abbreviations like -03 and -0330 for 304b8ee424SYuri Pankov# integer hour and minute UT offsets. Although earlier editions used 31dafc4501SDan McDonald# alphabetic time zone abbreviations, these abbreviations were 32dafc4501SDan McDonald# invented and did not reflect common practice. 33503609a9SYuri Pankov 34503609a9SYuri Pankov############################################################################### 35503609a9SYuri Pankov 36503609a9SYuri Pankov############################################################################### 37503609a9SYuri Pankov 38503609a9SYuri Pankov# Argentina 39503609a9SYuri Pankov 40503609a9SYuri Pankov# From Bob Devine (1988-01-28): 41503609a9SYuri Pankov# Argentina: first Sunday in October to first Sunday in April since 1976. 42503609a9SYuri Pankov# Double Summer time from 1969 to 1974. Switches at midnight. 43503609a9SYuri Pankov 44503609a9SYuri Pankov# From U. S. Naval Observatory (1988-01-19): 45503609a9SYuri Pankov# ARGENTINA 3 H BEHIND UTC 46503609a9SYuri Pankov 47503609a9SYuri Pankov# From Hernan G. Otero (1995-06-26): 48503609a9SYuri Pankov# I am sending modifications to the Argentine time zone table... 49503609a9SYuri Pankov# AR was chosen because they are the ISO letters that represent Argentina. 50503609a9SYuri Pankov 51f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 523508b934SYuri PankovRule Arg 1930 only - Dec 1 0:00 1:00 - 53503609a9SYuri PankovRule Arg 1931 only - Apr 1 0:00 0 - 543508b934SYuri PankovRule Arg 1931 only - Oct 15 0:00 1:00 - 55503609a9SYuri PankovRule Arg 1932 1940 - Mar 1 0:00 0 - 563508b934SYuri PankovRule Arg 1932 1939 - Nov 1 0:00 1:00 - 573508b934SYuri PankovRule Arg 1940 only - Jul 1 0:00 1:00 - 58503609a9SYuri PankovRule Arg 1941 only - Jun 15 0:00 0 - 593508b934SYuri PankovRule Arg 1941 only - Oct 15 0:00 1:00 - 60503609a9SYuri PankovRule Arg 1943 only - Aug 1 0:00 0 - 613508b934SYuri PankovRule Arg 1943 only - Oct 15 0:00 1:00 - 62503609a9SYuri PankovRule Arg 1946 only - Mar 1 0:00 0 - 633508b934SYuri PankovRule Arg 1946 only - Oct 1 0:00 1:00 - 64503609a9SYuri PankovRule Arg 1963 only - Oct 1 0:00 0 - 653508b934SYuri PankovRule Arg 1963 only - Dec 15 0:00 1:00 - 66503609a9SYuri PankovRule Arg 1964 1966 - Mar 1 0:00 0 - 673508b934SYuri PankovRule Arg 1964 1966 - Oct 15 0:00 1:00 - 68503609a9SYuri PankovRule Arg 1967 only - Apr 2 0:00 0 - 693508b934SYuri PankovRule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 - 70503609a9SYuri PankovRule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 713508b934SYuri PankovRule Arg 1974 only - Jan 23 0:00 1:00 - 72503609a9SYuri PankovRule Arg 1974 only - May 1 0:00 0 - 733508b934SYuri PankovRule Arg 1988 only - Dec 1 0:00 1:00 - 74503609a9SYuri Pankov# 75503609a9SYuri Pankov# From Hernan G. Otero (1995-06-26): 76503609a9SYuri Pankov# These corrections were contributed by InterSoft Argentina S.A., 77503609a9SYuri Pankov# obtaining the data from the: 78503609a9SYuri Pankov# Talleres de Hidrografía Naval Argentina 79503609a9SYuri Pankov# (Argentine Naval Hydrography Institute) 80503609a9SYuri PankovRule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 813508b934SYuri PankovRule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 - 82503609a9SYuri Pankov# 83503609a9SYuri Pankov# From Hernan G. Otero (1995-06-26): 84503609a9SYuri Pankov# From this moment on, the law that mandated the daylight saving 85503609a9SYuri Pankov# time corrections was derogated and no more modifications 86503609a9SYuri Pankov# to the time zones (for daylight saving) are now made. 87503609a9SYuri Pankov# 88503609a9SYuri Pankov# From Rives McDow (2000-01-10): 89503609a9SYuri Pankov# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 90503609a9SYuri Pankov# which did not result in the switch of a time zone, as they stayed 9 hours 91503609a9SYuri Pankov# from the International Date Line. 923508b934SYuri PankovRule Arg 1999 only - Oct Sun>=1 0:00 1:00 - 93503609a9SYuri Pankov# From Paul Eggert (2007-12-28): 94503609a9SYuri Pankov# DST was set to expire on March 5, not March 3, but since it was converted 95503609a9SYuri Pankov# to standard time on March 3 it's more convenient for us to pretend that 96503609a9SYuri Pankov# it ended on March 3. 97503609a9SYuri PankovRule Arg 2000 only - Mar 3 0:00 0 - 98503609a9SYuri Pankov# 99503609a9SYuri Pankov# From Peter Gradelski via Steffen Thorsen (2000-03-01): 100503609a9SYuri Pankov# We just checked with our São Paulo office and they say the government of 101503609a9SYuri Pankov# Argentina decided not to become one of the countries that go on or off DST. 102503609a9SYuri Pankov# So Buenos Aires should be -3 hours from GMT at all times. 103503609a9SYuri Pankov# 104503609a9SYuri Pankov# From Fabián L. Arce Jofré (2000-04-04): 105503609a9SYuri Pankov# The law that claimed DST for Argentina was derogated by President Fernando 106503609a9SYuri Pankov# de la Rúa on March 2, 2000, because it would make people spend more energy 107503609a9SYuri Pankov# in the winter time, rather than less. The change took effect on March 3. 108503609a9SYuri Pankov# 109503609a9SYuri Pankov# From Mariano Absatz (2001-06-06): 110503609a9SYuri Pankov# one of the major newspapers here in Argentina said that the 1999 111503609a9SYuri Pankov# Timezone Law (which never was effectively applied) will (would?) be 112503609a9SYuri Pankov# in effect.... The article is at 113503609a9SYuri Pankov# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 114503609a9SYuri Pankov# ... The Law itself is "Ley No. 25155", sanctioned on 1999-08-25, enacted 115503609a9SYuri Pankov# 1999-09-17, and published 1999-09-21. The official publication is at: 116503609a9SYuri Pankov# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 117503609a9SYuri Pankov# Regretfully, you have to subscribe (and pay) for the on-line version.... 118503609a9SYuri Pankov# 119503609a9SYuri Pankov# (2001-06-12): 120503609a9SYuri Pankov# the timezone for Argentina will not change next Sunday. 121503609a9SYuri Pankov# Apparently it will do so on Sunday 24th.... 122503609a9SYuri Pankov# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 123503609a9SYuri Pankov# 124503609a9SYuri Pankov# (2001-06-25): 125503609a9SYuri Pankov# Last Friday (yes, the last working day before the date of the change), the 126503609a9SYuri Pankov# Senate annulled the 1999 law that introduced the changes later postponed. 127503609a9SYuri Pankov# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 128503609a9SYuri Pankov# It remains the vote of the Deputies..., but it will be the same.... 129503609a9SYuri Pankov# This kind of things had always been done this way in Argentina. 130503609a9SYuri Pankov# We are still -03:00 all year round in all of the country. 131503609a9SYuri Pankov# 132503609a9SYuri Pankov# From Steffen Thorsen (2007-12-21): 133503609a9SYuri Pankov# A user (Leonardo Chaim) reported that Argentina will adopt DST.... 134503609a9SYuri Pankov# all of the country (all Zone-entries) are affected. News reports like 135503609a9SYuri Pankov# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate 136503609a9SYuri Pankov# that Argentina will use DST next year as well, from October to 137503609a9SYuri Pankov# March, although exact rules are not given. 138503609a9SYuri Pankov# 139503609a9SYuri Pankov# From Jesper Nørgaard Welen (2007-12-26) 140503609a9SYuri Pankov# The last hurdle of Argentina DST is over, the proposal was approved in 141503609a9SYuri Pankov# the lower chamber too (Diputados) with a vote 192 for and 2 against. 142503609a9SYuri Pankov# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to 143503609a9SYuri Pankov# the original scanned proposal, where the dates and the zero hours are 144503609a9SYuri Pankov# clear and unambiguous...This is the article about final approval: 145503609a9SYuri Pankov# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996 146503609a9SYuri Pankov# 147503609a9SYuri Pankov# From Paul Eggert (2007-12-22): 148503609a9SYuri Pankov# For dates after mid-2008, the following rules are my guesses and 149503609a9SYuri Pankov# are quite possibly wrong, but are more likely than no DST at all. 150503609a9SYuri Pankov 151503609a9SYuri Pankov# From Alexander Krivenyshev (2008-09-05): 152503609a9SYuri Pankov# As per message from Carlos Alberto Fonseca Arauz (Nicaragua), 153503609a9SYuri Pankov# Argentina will start DST on Sunday October 19, 2008. 154503609a9SYuri Pankov# 155503609a9SYuri Pankov# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html 156503609a9SYuri Pankov# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish) 157503609a9SYuri Pankov 158503609a9SYuri Pankov# From Juan Manuel Docile in https://bugs.gentoo.org/240339 (2008-10-07) 159503609a9SYuri Pankov# via Rodrigo Severo: 160503609a9SYuri Pankov# Argentinian law No. 25.155 is no longer valid. 161503609a9SYuri Pankov# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm 162503609a9SYuri Pankov# The new one is law No. 26.350 163503609a9SYuri Pankov# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm 164503609a9SYuri Pankov# So there is no summer time in Argentina for now. 165503609a9SYuri Pankov 166503609a9SYuri Pankov# From Mariano Absatz (2008-10-20): 167503609a9SYuri Pankov# Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST 168503609a9SYuri Pankov# in Argentina from 2008-10-19 until 2009-03-15. 169503609a9SYuri Pankov# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01 170503609a9SYuri Pankov# 171503609a9SYuri Pankov 172503609a9SYuri Pankov# Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 173503609a9SYuri Pankov# 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La 174503609a9SYuri Pankov# Pampa, Neuquén, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego 175503609a9SYuri Pankov# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01 176503609a9SYuri Pankov# 177503609a9SYuri Pankov# Press release 235 dated Saturday October 18th, from the Government of the 178503609a9SYuri Pankov# Province of Jujuy saying it will not apply DST either (even when it was not 179503609a9SYuri Pankov# included in Decree 1705/2008). 180503609a9SYuri Pankov# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc 181503609a9SYuri Pankov 182503609a9SYuri Pankov# From fullinet (2009-10-18): 183503609a9SYuri Pankov# As announced in 184503609a9SYuri Pankov# http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356 185503609a9SYuri Pankov# (an official .gob.ar) under title: "Sin Cambio de Hora" 186503609a9SYuri Pankov# (English: "No hour change"). 187503609a9SYuri Pankov# 188503609a9SYuri Pankov# "Por el momento, el Gobierno Nacional resolvió no modificar la hora 189503609a9SYuri Pankov# oficial, decisión que estaba en estudio para su implementación el 190503609a9SYuri Pankov# domingo 18 de octubre. Desde el Ministerio de Planificación se anunció 191503609a9SYuri Pankov# que la Argentina hoy, en estas condiciones meteorológicas, no necesita 192503609a9SYuri Pankov# la modificación del huso horario, ya que 2009 nos encuentra con 193503609a9SYuri Pankov# crecimiento en la producción y distribución energética." 194503609a9SYuri Pankov 1953508b934SYuri PankovRule Arg 2007 only - Dec 30 0:00 1:00 - 196503609a9SYuri PankovRule Arg 2008 2009 - Mar Sun>=15 0:00 0 - 1973508b934SYuri PankovRule Arg 2008 only - Oct Sun>=15 0:00 1:00 - 198503609a9SYuri Pankov 199503609a9SYuri Pankov# From Mariano Absatz (2004-05-21): 200503609a9SYuri Pankov# Today it was officially published that the Province of Mendoza is changing 201503609a9SYuri Pankov# its timezone this winter... starting tomorrow night.... 202503609a9SYuri Pankov# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 203503609a9SYuri Pankov# From Paul Eggert (2004-05-24): 204503609a9SYuri Pankov# It's Law No. 7,210. This change is due to a public power emergency, so for 205503609a9SYuri Pankov# now we'll assume it's for this year only. 206503609a9SYuri Pankov# 2073508b934SYuri Pankov# From Paul Eggert (2018-01-31): 208503609a9SYuri Pankov# Hora de verano para la República Argentina 209503609a9SYuri Pankov# http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html 210503609a9SYuri Pankov# says that standard time in Argentina from 1894-10-31 211af2e290bSAndy Fiddaman# to 1920-05-01 was -4:16:48.25. Go with this more precise value 2123508b934SYuri Pankov# over Shanks & Pottenger. It is upward compatible with Milne, who 2133508b934SYuri Pankov# says Córdoba time was -4:16:48.2. 2143508b934SYuri Pankov 215503609a9SYuri Pankov# 216503609a9SYuri Pankov# From Mariano Absatz (2004-06-05): 217503609a9SYuri Pankov# These media articles from a major newspaper mostly cover the current state: 218503609a9SYuri Pankov# http://www.lanacion.com.ar/04/05/27/de_604825.asp 219503609a9SYuri Pankov# http://www.lanacion.com.ar/04/05/28/de_605203.asp 220503609a9SYuri Pankov# 221503609a9SYuri Pankov# The following eight (8) provinces pulled clocks back to UTC-04:00 at 222503609a9SYuri Pankov# midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 223503609a9SYuri Pankov# Apparently, all nine provinces would go back to UTC-03:00 at the same 224503609a9SYuri Pankov# time in October 17th. 225503609a9SYuri Pankov# 226503609a9SYuri Pankov# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 227503609a9SYuri Pankov# Tierra del Fuego, Tucumán. 228503609a9SYuri Pankov# 229503609a9SYuri Pankov# From Mariano Absatz (2004-06-14): 230503609a9SYuri Pankov# ... this weekend, the Province of Tucumán decided it'd go back to UTC-03:00 231503609a9SYuri Pankov# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 232503609a9SYuri Pankov# annoyance with the change is much higher than the power savings obtained.... 233503609a9SYuri Pankov# 234503609a9SYuri Pankov# From Gwillim Law (2004-06-14): 235503609a9SYuri Pankov# http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 236503609a9SYuri Pankov# "The time change in Tierra del Fuego was a conflicted decision from 237503609a9SYuri Pankov# the start. The government had decreed that the measure would take 238503609a9SYuri Pankov# effect on June 1, but a normative error forced the new time to begin 239503609a9SYuri Pankov# three days earlier, from a Saturday to a Sunday.... 240503609a9SYuri Pankov# Our understanding was that the change was originally scheduled to take place 241503609a9SYuri Pankov# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 242503609a9SYuri Pankov# provinces). Sunday was May 30, only two days earlier. So the article 243503609a9SYuri Pankov# contains a contradiction. I would give more credence to the Saturday/Sunday 244503609a9SYuri Pankov# date than the "three days earlier" phrase, and conclude that Tierra del 245503609a9SYuri Pankov# Fuego set its clocks back at 2004-05-30 00:00. 246503609a9SYuri Pankov# 247503609a9SYuri Pankov# From Steffen Thorsen (2004-10-05): 248503609a9SYuri Pankov# The previous law 7210 which changed the province of Mendoza's time zone 249503609a9SYuri Pankov# back in May have been modified slightly in a new law 7277, which set the 250503609a9SYuri Pankov# new end date to 2004-09-26 (original date was 2004-10-17). 251503609a9SYuri Pankov# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 252503609a9SYuri Pankov# 253503609a9SYuri Pankov# From Mariano Absatz (2004-10-05): 254503609a9SYuri Pankov# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 255503609a9SYuri Pankov# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 256503609a9SYuri Pankov# at midnight between Saturday, July 24th and Sunday, July 25th.... 257503609a9SYuri Pankov# http://www.sanjuan.gov.ar/prensa/archivo/000329.html 258503609a9SYuri Pankov# http://www.sanjuan.gov.ar/prensa/archivo/000426.html 259503609a9SYuri Pankov# http://www.sanjuan.gov.ar/prensa/archivo/000441.html 260503609a9SYuri Pankov 261503609a9SYuri Pankov# From Alex Krivenyshev (2008-01-17): 262503609a9SYuri Pankov# Here are articles that Argentina Province San Luis is planning to end DST 263503609a9SYuri Pankov# as earlier as upcoming Monday January 21, 2008 or February 2008: 264503609a9SYuri Pankov# 265503609a9SYuri Pankov# Provincia argentina retrasa reloj y marca diferencia con resto del país 266503609a9SYuri Pankov# (Argentine Province delayed clock and mark difference with the rest of the 267503609a9SYuri Pankov# country) 268503609a9SYuri Pankov# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel 269503609a9SYuri Pankov# 270503609a9SYuri Pankov# Es inminente que en San Luis atrasen una hora los relojes 271503609a9SYuri Pankov# (It is imminent in San Luis clocks one hour delay) 272b654b02dSYuri Pankov# https://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html 273b654b02dSYuri Pankov# http://www.worldtimezone.com/dst_news/dst_news_argentina02.html 274503609a9SYuri Pankov 275503609a9SYuri Pankov# From Jesper Nørgaard Welen (2008-01-18): 276503609a9SYuri Pankov# The page of the San Luis provincial government 277503609a9SYuri Pankov# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812 278503609a9SYuri Pankov# confirms what Alex Krivenyshev has earlier sent to the tz 279503609a9SYuri Pankov# emailing list about that San Luis plans to return to standard 280503609a9SYuri Pankov# time much earlier than the rest of the country. It also 281503609a9SYuri Pankov# confirms that upon request the provinces San Juan and Mendoza 282503609a9SYuri Pankov# refused to follow San Luis in this change. 283503609a9SYuri Pankov# 284503609a9SYuri Pankov# The change is supposed to take place Monday the 21st at 0:00 285503609a9SYuri Pankov# hours. As far as I understand it if this goes ahead, we need 286503609a9SYuri Pankov# a new timezone for San Luis (although there are also documented 287503609a9SYuri Pankov# independent changes in the southamerica file of San Luis in 288503609a9SYuri Pankov# 1990 and 1991 which has not been confirmed). 289503609a9SYuri Pankov 290503609a9SYuri Pankov# From Jesper Nørgaard Welen (2008-01-25): 291503609a9SYuri Pankov# Unfortunately the below page has become defunct, about the San Luis 292503609a9SYuri Pankov# time change. Perhaps because it now is part of a group of pages "Most 293503609a9SYuri Pankov# important pages of 2008." 294503609a9SYuri Pankov# 295503609a9SYuri Pankov# You can use 296503609a9SYuri Pankov# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834 297503609a9SYuri Pankov# instead it seems. Or use "Buscador" from the main page of the San Luis 298503609a9SYuri Pankov# government, and fill in "huso" and click OK, and you will get 3 pages 299503609a9SYuri Pankov# from which the first one is identical to the above. 300503609a9SYuri Pankov 301503609a9SYuri Pankov# From Mariano Absatz (2008-01-28): 302503609a9SYuri Pankov# I can confirm that the Province of San Luis (and so far only that 303503609a9SYuri Pankov# province) decided to go back to UTC-3 effective midnight Jan 20th 2008 304503609a9SYuri Pankov# (that is, Monday 21st at 0:00 is the time the clocks were delayed back 305503609a9SYuri Pankov# 1 hour), and they intend to keep UTC-3 as their timezone all year round 306503609a9SYuri Pankov# (that is, unless they change their mind any minute now). 307503609a9SYuri Pankov# 308503609a9SYuri Pankov# So we'll have to add yet another city to 'southamerica' (I think San 309503609a9SYuri Pankov# Luis city is the mos populated city in the Province, so it'd be 310503609a9SYuri Pankov# America/Argentina/San_Luis... of course I can't remember if San Luis's 311503609a9SYuri Pankov# history of particular changes goes along with Mendoza or San Juan :-( 312503609a9SYuri Pankov# (I only remember not being able to collect hard facts about San Luis 313503609a9SYuri Pankov# back in 2004, when these provinces changed to UTC-4 for a few days, I 314503609a9SYuri Pankov# mailed them personally and never got an answer). 315503609a9SYuri Pankov 316503609a9SYuri Pankov# From Paul Eggert (2014-08-12): 317503609a9SYuri Pankov# Unless otherwise specified, data entries are from Shanks & Pottenger through 318503609a9SYuri Pankov# 1992, from the IATA otherwise. As noted below, Shanks & Pottenger say that 319503609a9SYuri Pankov# America/Cordoba split into 6 subregions during 1991/1992, one of which 320503609a9SYuri Pankov# was America/San_Luis, but we haven't verified this yet so for now we'll 321503609a9SYuri Pankov# keep America/Cordoba a single region rather than splitting it into the 322503609a9SYuri Pankov# other 5 subregions. 323503609a9SYuri Pankov 324503609a9SYuri Pankov# From Mariano Absatz (2009-03-13): 325503609a9SYuri Pankov# Yesterday (with our usual 2-day notice) the Province of San Luis 326503609a9SYuri Pankov# decided that next Sunday instead of "staying" @utc-03:00 they will go 327503609a9SYuri Pankov# to utc-04:00 until the second Saturday in October... 328503609a9SYuri Pankov# 329503609a9SYuri Pankov# The press release is at 330503609a9SYuri Pankov# http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102 331503609a9SYuri Pankov# (I couldn't find the decree, but www.sanluis.gov.ar 332503609a9SYuri Pankov# is the official page for the Province Government.) 333503609a9SYuri Pankov# 334503609a9SYuri Pankov# There's also a note in only one of the major national papers ... 335503609a9SYuri Pankov# http://www.lanacion.com.ar/nota.asp?nota_id=1107912 336503609a9SYuri Pankov# 337503609a9SYuri Pankov# The press release says [quick and dirty translation]: 338503609a9SYuri Pankov# ... announced that next Sunday, at 00:00, Puntanos (the San Luis 339503609a9SYuri Pankov# inhabitants) will have to turn back one hour their clocks 340503609a9SYuri Pankov# 341503609a9SYuri Pankov# Since then, San Luis will establish its own Province timezone. Thus, 342503609a9SYuri Pankov# during 2009, this timezone change will run from 00:00 the third Sunday 343503609a9SYuri Pankov# in March until 24:00 of the second Saturday in October. 344503609a9SYuri Pankov 345503609a9SYuri Pankov# From Mariano Absatz (2009-10-16): 346503609a9SYuri Pankov# ...the Province of San Luis is a case in itself. 347503609a9SYuri Pankov# 348503609a9SYuri Pankov# The Law at 349503609a9SYuri Pankov# http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276 350503609a9SYuri Pankov# is ambiguous because establishes a calendar from the 2nd Sunday in 351503609a9SYuri Pankov# October at 0:00 thru the 2nd Saturday in March at 24:00 and the 352503609a9SYuri Pankov# complement of that starting on the 2nd Sunday of March at 0:00 and 353503609a9SYuri Pankov# ending on the 2nd Saturday of March at 24:00. 354503609a9SYuri Pankov# 355503609a9SYuri Pankov# This clearly breaks every time the 1st of March or October is a Sunday. 356503609a9SYuri Pankov# 357503609a9SYuri Pankov# IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd 358503609a9SYuri Pankov# Sunday of October and March. 359503609a9SYuri Pankov# 360503609a9SYuri Pankov# The problem is that the changes in the rest of the Provinces that did 361503609a9SYuri Pankov# change in 2007/2008, were made according to the Federal Law and Decrees 362503609a9SYuri Pankov# that did so on the 3rd Sunday of October and March. 363503609a9SYuri Pankov# 364503609a9SYuri Pankov# In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday 365503609a9SYuri Pankov# (October 11th) at 0:00. 366503609a9SYuri Pankov# 367503609a9SYuri Pankov# So I guess a new set of rules, besides "Arg", must be made and the last 368503609a9SYuri Pankov# America/Argentina/San_Luis entries should change to use these... 369503609a9SYuri Pankov# ... 370503609a9SYuri Pankov 371503609a9SYuri Pankov# From Alexander Krivenyshev (2010-04-09): 372503609a9SYuri Pankov# According to news reports from El Diario de la República Province San 373503609a9SYuri Pankov# Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time 374503609a9SYuri Pankov# after April 11, 2010 - will continue to have same time as rest of 375503609a9SYuri Pankov# Argentina (UTC-3) (no DST). 376503609a9SYuri Pankov# 377503609a9SYuri Pankov# Confirmaron la prórroga del huso horario de verano (Spanish) 378503609a9SYuri Pankov# http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9 379503609a9SYuri Pankov# or (some English translation): 380503609a9SYuri Pankov# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html 381503609a9SYuri Pankov 382503609a9SYuri Pankov# From Mariano Absatz (2010-04-12): 383503609a9SYuri Pankov# yes...I can confirm this...and given that San Luis keeps calling 384503609a9SYuri Pankov# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg" 385503609a9SYuri Pankov# rules...San Luis is still using "Western ARgentina Time" and it got 386503609a9SYuri Pankov# stuck on Summer daylight savings time even though the summer is over. 387503609a9SYuri Pankov 3883508b934SYuri Pankov# From Paul Eggert (2018-01-23): 389503609a9SYuri Pankov# Perhaps San Luis operates on the legal fiction that it is at -04 3903508b934SYuri Pankov# with perpetual daylight saving time, but ordinary usage typically seems to 391503609a9SYuri Pankov# just say it's at -03; see, for example, 392b654b02dSYuri Pankov# https://es.wikipedia.org/wiki/Hora_oficial_argentina 393503609a9SYuri Pankov# We've documented similar situations as being plain changes to 394503609a9SYuri Pankov# standard time, so let's do that here too. This does not change UTC 395503609a9SYuri Pankov# offsets, only tm_isdst and the time zone abbreviations. One minor 396503609a9SYuri Pankov# plus is that this silences a zic complaint that there's no POSIX TZ 397503609a9SYuri Pankov# setting for timestamps past 2038. 398503609a9SYuri Pankov 399374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 400503609a9SYuri Pankov# 401503609a9SYuri Pankov# Buenos Aires (BA), Capital Federal (CF), 402503609a9SYuri PankovZone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 403427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 404503609a9SYuri Pankov -4:16:48 - CMT 1920 May # Córdoba Mean Time 405dafc4501SDan McDonald -4:00 - -04 1930 Dec 406dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 407dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 408dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 409dafc4501SDan McDonald -3:00 Arg -03/-02 410503609a9SYuri Pankov# 411503609a9SYuri Pankov# Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN), 412503609a9SYuri Pankov# Chaco (CC), Formosa (FM), Santiago del Estero (SE) 413503609a9SYuri Pankov# 414503609a9SYuri Pankov# Shanks & Pottenger also make the following claims, which we haven't verified: 415503609a9SYuri Pankov# - Formosa switched to -3:00 on 1991-01-07. 416503609a9SYuri Pankov# - Misiones switched to -3:00 on 1990-12-29. 417503609a9SYuri Pankov# - Chaco switched to -3:00 on 1991-01-04. 418503609a9SYuri Pankov# - Santiago del Estero switched to -4:00 on 1991-04-01, 419503609a9SYuri Pankov# then to -3:00 on 1991-04-26. 420503609a9SYuri Pankov# 421427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 422503609a9SYuri PankovZone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 423503609a9SYuri Pankov -4:16:48 - CMT 1920 May 424dafc4501SDan McDonald -4:00 - -04 1930 Dec 425dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 426dafc4501SDan McDonald -3:00 Arg -03/-02 1991 Mar 3 427dafc4501SDan McDonald -4:00 - -04 1991 Oct 20 428dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 429dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 430dafc4501SDan McDonald -3:00 Arg -03/-02 431503609a9SYuri Pankov# 432503609a9SYuri Pankov# Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN) 433503609a9SYuri PankovZone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31 434427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 435503609a9SYuri Pankov -4:16:48 - CMT 1920 May 436dafc4501SDan McDonald -4:00 - -04 1930 Dec 437dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 438dafc4501SDan McDonald -3:00 Arg -03/-02 1991 Mar 3 439dafc4501SDan McDonald -4:00 - -04 1991 Oct 20 440dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 441dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 442dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 443dafc4501SDan McDonald -3:00 - -03 444503609a9SYuri Pankov# 445503609a9SYuri Pankov# Tucumán (TM) 446503609a9SYuri PankovZone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 447427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 448503609a9SYuri Pankov -4:16:48 - CMT 1920 May 449dafc4501SDan McDonald -4:00 - -04 1930 Dec 450dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 451dafc4501SDan McDonald -3:00 Arg -03/-02 1991 Mar 3 452dafc4501SDan McDonald -4:00 - -04 1991 Oct 20 453dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 454dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 455dafc4501SDan McDonald -3:00 - -03 2004 Jun 1 456dafc4501SDan McDonald -4:00 - -04 2004 Jun 13 457dafc4501SDan McDonald -3:00 Arg -03/-02 458503609a9SYuri Pankov# 459503609a9SYuri Pankov# La Rioja (LR) 460503609a9SYuri PankovZone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 461427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 462503609a9SYuri Pankov -4:16:48 - CMT 1920 May 463dafc4501SDan McDonald -4:00 - -04 1930 Dec 464dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 465dafc4501SDan McDonald -3:00 Arg -03/-02 1991 Mar 1 466dafc4501SDan McDonald -4:00 - -04 1991 May 7 467dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 468dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 469dafc4501SDan McDonald -3:00 - -03 2004 Jun 1 470dafc4501SDan McDonald -4:00 - -04 2004 Jun 20 471dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 472dafc4501SDan McDonald -3:00 - -03 473503609a9SYuri Pankov# 474503609a9SYuri Pankov# San Juan (SJ) 475503609a9SYuri PankovZone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 476427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 477503609a9SYuri Pankov -4:16:48 - CMT 1920 May 478dafc4501SDan McDonald -4:00 - -04 1930 Dec 479dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 480dafc4501SDan McDonald -3:00 Arg -03/-02 1991 Mar 1 481dafc4501SDan McDonald -4:00 - -04 1991 May 7 482dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 483dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 484dafc4501SDan McDonald -3:00 - -03 2004 May 31 485dafc4501SDan McDonald -4:00 - -04 2004 Jul 25 486dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 487dafc4501SDan McDonald -3:00 - -03 488503609a9SYuri Pankov# 489503609a9SYuri Pankov# Jujuy (JY) 490503609a9SYuri PankovZone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 491427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 492503609a9SYuri Pankov -4:16:48 - CMT 1920 May 493dafc4501SDan McDonald -4:00 - -04 1930 Dec 494dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 495dafc4501SDan McDonald -3:00 Arg -03/-02 1990 Mar 4 496dafc4501SDan McDonald -4:00 - -04 1990 Oct 28 497dafc4501SDan McDonald -4:00 1:00 -03 1991 Mar 17 498dafc4501SDan McDonald -4:00 - -04 1991 Oct 6 499dafc4501SDan McDonald -3:00 1:00 -02 1992 500dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 501dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 502dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 503dafc4501SDan McDonald -3:00 - -03 504503609a9SYuri Pankov# 505503609a9SYuri Pankov# Catamarca (CT), Chubut (CH) 506503609a9SYuri PankovZone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 507427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 508503609a9SYuri Pankov -4:16:48 - CMT 1920 May 509dafc4501SDan McDonald -4:00 - -04 1930 Dec 510dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 511dafc4501SDan McDonald -3:00 Arg -03/-02 1991 Mar 3 512dafc4501SDan McDonald -4:00 - -04 1991 Oct 20 513dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 514dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 515dafc4501SDan McDonald -3:00 - -03 2004 Jun 1 516dafc4501SDan McDonald -4:00 - -04 2004 Jun 20 517dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 518dafc4501SDan McDonald -3:00 - -03 519503609a9SYuri Pankov# 520503609a9SYuri Pankov# Mendoza (MZ) 521503609a9SYuri PankovZone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 522427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 523503609a9SYuri Pankov -4:16:48 - CMT 1920 May 524dafc4501SDan McDonald -4:00 - -04 1930 Dec 525dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 526dafc4501SDan McDonald -3:00 Arg -03/-02 1990 Mar 4 527dafc4501SDan McDonald -4:00 - -04 1990 Oct 15 528dafc4501SDan McDonald -4:00 1:00 -03 1991 Mar 1 529dafc4501SDan McDonald -4:00 - -04 1991 Oct 15 530dafc4501SDan McDonald -4:00 1:00 -03 1992 Mar 1 531dafc4501SDan McDonald -4:00 - -04 1992 Oct 18 532dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 533dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 534dafc4501SDan McDonald -3:00 - -03 2004 May 23 535dafc4501SDan McDonald -4:00 - -04 2004 Sep 26 536dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 537dafc4501SDan McDonald -3:00 - -03 538503609a9SYuri Pankov# 539503609a9SYuri Pankov# San Luis (SL) 540503609a9SYuri Pankov 541503609a9SYuri PankovRule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 - 5423508b934SYuri PankovRule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 - 543503609a9SYuri Pankov 544503609a9SYuri PankovZone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31 545427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 546503609a9SYuri Pankov -4:16:48 - CMT 1920 May 547dafc4501SDan McDonald -4:00 - -04 1930 Dec 548dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 549dafc4501SDan McDonald -3:00 Arg -03/-02 1990 550dafc4501SDan McDonald -3:00 1:00 -02 1990 Mar 14 551dafc4501SDan McDonald -4:00 - -04 1990 Oct 15 552dafc4501SDan McDonald -4:00 1:00 -03 1991 Mar 1 553dafc4501SDan McDonald -4:00 - -04 1991 Jun 1 554dafc4501SDan McDonald -3:00 - -03 1999 Oct 3 555dafc4501SDan McDonald -4:00 1:00 -03 2000 Mar 3 556dafc4501SDan McDonald -3:00 - -03 2004 May 31 557dafc4501SDan McDonald -4:00 - -04 2004 Jul 25 558dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Jan 21 559dafc4501SDan McDonald -4:00 SanLuis -04/-03 2009 Oct 11 560dafc4501SDan McDonald -3:00 - -03 561503609a9SYuri Pankov# 562503609a9SYuri Pankov# Santa Cruz (SC) 563503609a9SYuri PankovZone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 564427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 565dafc4501SDan McDonald -4:16:48 - CMT 1920 May 566dafc4501SDan McDonald -4:00 - -04 1930 Dec 567dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 568dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 569dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 570dafc4501SDan McDonald -3:00 - -03 2004 Jun 1 571dafc4501SDan McDonald -4:00 - -04 2004 Jun 20 572dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 573dafc4501SDan McDonald -3:00 - -03 574503609a9SYuri Pankov# 575503609a9SYuri Pankov# Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF) 576503609a9SYuri PankovZone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 577427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 578dafc4501SDan McDonald -4:16:48 - CMT 1920 May 579dafc4501SDan McDonald -4:00 - -04 1930 Dec 580dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 581dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 582dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 583dafc4501SDan McDonald -3:00 - -03 2004 May 30 584dafc4501SDan McDonald -4:00 - -04 2004 Jun 20 585dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 586dafc4501SDan McDonald -3:00 - -03 587503609a9SYuri Pankov 588503609a9SYuri Pankov# Bolivia 589374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 590503609a9SYuri PankovZone America/La_Paz -4:32:36 - LMT 1890 591503609a9SYuri Pankov -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 5924b8ee424SYuri Pankov -4:32:36 1:00 BST 1932 Mar 21 # Bolivia ST 593dafc4501SDan McDonald -4:00 - -04 594503609a9SYuri Pankov 595503609a9SYuri Pankov# Brazil 596503609a9SYuri Pankov 597503609a9SYuri Pankov# From Paul Eggert (1993-11-18): 598503609a9SYuri Pankov# The mayor of Rio recently attempted to change the time zone rules 599503609a9SYuri Pankov# just in his city, in order to leave more summer time for the tourist trade. 600503609a9SYuri Pankov# The rule change lasted only part of the day; 601503609a9SYuri Pankov# the federal government refused to follow the city's rules, and business 602503609a9SYuri Pankov# was in a chaos, so the mayor backed down that afternoon. 603503609a9SYuri Pankov 604503609a9SYuri Pankov# From IATA SSIM (1996-02): 605503609a9SYuri Pankov# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 606503609a9SYuri Pankov# Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ), 607503609a9SYuri Pankov# Espírito Santo (ES), Minas Gerais (MG), Bahia (BA), Goiás (GO), 608503609a9SYuri Pankov# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 609503609a9SYuri Pankov# [The last three states are new to this issue of the IATA SSIM.] 610503609a9SYuri Pankov 611503609a9SYuri Pankov# From Gwillim Law (1996-10-07): 612503609a9SYuri Pankov# Geography, history (Tocantins was part of Goiás until 1989), and other 613503609a9SYuri Pankov# sources of time zone information lead me to believe that AL, SE, and TO were 614503609a9SYuri Pankov# always in BR1, and so the only change was whether or not they observed DST.... 615503609a9SYuri Pankov# The earliest issue of the SSIM I have is 2/91. Each issue from then until 616503609a9SYuri Pankov# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 617503609a9SYuri Pankov# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 618503609a9SYuri Pankov# (UTC-4).... The other two time zones given for Brazil are BR3, which is 619503609a9SYuri Pankov# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 620503609a9SYuri Pankov# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 621503609a9SYuri Pankov# become part of the state of Pernambuco). The boundary between BR1 and BR2 622503609a9SYuri Pankov# has never been clearly stated. They've simply been called East and West. 623503609a9SYuri Pankov# However, some conclusions can be drawn from another IATA manual: the Airline 624503609a9SYuri Pankov# Coding Directory, which lists close to 400 airports in Brazil. For each 625503609a9SYuri Pankov# airport it gives a time zone which is coded to the SSIM. From that 626503609a9SYuri Pankov# information, I'm led to conclude that the states of Amapá (AP), Ceará (CE), 627503609a9SYuri Pankov# Maranhão (MA), Paraíba (PR), Pernambuco (PE), Piauí (PI), and Rio Grande do 628503609a9SYuri Pankov# Norte (RN), and the eastern part of Pará (PA) are all in BR1 without DST. 629503609a9SYuri Pankov 630503609a9SYuri Pankov# From Marcos Tadeu (1998-09-27): 631503609a9SYuri Pankov# Brazilian official page <http://pcdsh01.on.br/verao1.html> 632503609a9SYuri Pankov 633503609a9SYuri Pankov# From Jesper Nørgaard (2000-11-03): 634503609a9SYuri Pankov# [For an official list of which regions in Brazil use which time zones, see:] 635503609a9SYuri Pankov# http://pcdsh01.on.br/Fusbr.htm 636503609a9SYuri Pankov# http://pcdsh01.on.br/Fusbrhv.htm 637503609a9SYuri Pankov 638503609a9SYuri Pankov# From Celso Doria via David Madeo (2002-10-09): 639503609a9SYuri Pankov# The reason for the delay this year has to do with elections in Brazil. 640503609a9SYuri Pankov# 641503609a9SYuri Pankov# Unlike in the United States, elections in Brazil are 100% computerized and 642503609a9SYuri Pankov# the results are known almost immediately. Yesterday, it was the first 643503609a9SYuri Pankov# round of the elections when 115 million Brazilians voted for President, 644503609a9SYuri Pankov# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 645503609a9SYuri Pankov# counting (or re-counting) votes anymore and we know there will be a second 646503609a9SYuri Pankov# round for the Presidency and also for some Governors. The 2nd round will 647503609a9SYuri Pankov# take place on October 27th. 648503609a9SYuri Pankov# 649503609a9SYuri Pankov# The reason why the DST will only begin November 3rd is that the thousands 650503609a9SYuri Pankov# of electoral machines used cannot have their time changed, and since the 651503609a9SYuri Pankov# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 652503609a9SYuri Pankov# the Government decided to postpone DST, instead of changing the Constitution 653503609a9SYuri Pankov# (maybe, for the next elections, it will be possible to change the clock)... 654503609a9SYuri Pankov 655503609a9SYuri Pankov# From Rodrigo Severo (2004-10-04): 656503609a9SYuri Pankov# It's just the biannual change made necessary by the much hyped, supposedly 657427b4c5cSAndy Fiddaman# modern Brazilian ... voting machines which, apparently, can't deal 658503609a9SYuri Pankov# with a time change between the first and the second rounds of the elections. 659503609a9SYuri Pankov 660503609a9SYuri Pankov# From Steffen Thorsen (2007-09-20): 661503609a9SYuri Pankov# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: 662503609a9SYuri Pankov# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975 663503609a9SYuri Pankov 664503609a9SYuri Pankov# From Paul Schulze (2008-06-24): 665503609a9SYuri Pankov# ...by law number 11.662 of April 24, 2008 (published in the "Diario 666503609a9SYuri Pankov# Oficial da União"...) in Brazil there are changes in the timezones, 667503609a9SYuri Pankov# effective today (00:00am at June 24, 2008) as follows: 668503609a9SYuri Pankov# 669503609a9SYuri Pankov# a) The timezone UTC+5 is extinguished, with all the Acre state and the 670503609a9SYuri Pankov# part of the Amazonas state that had this timezone now being put to the 671503609a9SYuri Pankov# timezone UTC+4 672503609a9SYuri Pankov# b) The whole Pará state now is put at timezone UTC+3, instead of just 673503609a9SYuri Pankov# part of it, as was before. 674503609a9SYuri Pankov# 675503609a9SYuri Pankov# This change follows a proposal of senator Tiao Viana of Acre state, that 676503609a9SYuri Pankov# proposed it due to concerns about open television channels displaying 677503609a9SYuri Pankov# programs inappropriate to youths in the states that had the timezone 678503609a9SYuri Pankov# UTC+5 too early in the night. In the occasion, some more corrections 679503609a9SYuri Pankov# were proposed, trying to unify the timezones of any given state. This 680503609a9SYuri Pankov# change modifies timezone rules defined in decree 2.784 of 18 June, 681503609a9SYuri Pankov# 1913. 682503609a9SYuri Pankov 683503609a9SYuri Pankov# From Rodrigo Severo (2008-06-24): 684503609a9SYuri Pankov# Just correcting the URL: 685503609a9SYuri Pankov# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008 686503609a9SYuri Pankov# 687503609a9SYuri Pankov# As a result of the above Decree I believe the America/Rio_Branco 688503609a9SYuri Pankov# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall 689503609a9SYuri Pankov# be created to represent the...west side of the Pará State. I 690503609a9SYuri Pankov# suggest this new timezone be called Santarem as the most 691503609a9SYuri Pankov# important/populated city in the affected area. 692503609a9SYuri Pankov# 693503609a9SYuri Pankov# This new timezone would be the same as the Rio_Branco timezone up to 694503609a9SYuri Pankov# the 2008/06/24 change which would be to UTC-3 instead of UTC-4. 695503609a9SYuri Pankov 696503609a9SYuri Pankov# From Alex Krivenyshev (2008-06-24): 697503609a9SYuri Pankov# This is a quick reference page for New and Old Brazil Time Zones map. 698503609a9SYuri Pankov# http://www.worldtimezone.com/brazil-time-new-old.php 699503609a9SYuri Pankov# 700503609a9SYuri Pankov# - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05 701503609a9SYuri Pankov# (state Acre and the part of the Amazonas will be UTC/GMT-04) - western 702503609a9SYuri Pankov# part of Par state is moving to one timezone UTC-03 (from UTC-04). 703503609a9SYuri Pankov 704503609a9SYuri Pankov# From Paul Eggert (2002-10-10): 705503609a9SYuri Pankov# The official decrees referenced below are mostly taken from 706503609a9SYuri Pankov# Decretos sobre o Horário de Verão no Brasil. 707503609a9SYuri Pankov# http://pcdsh01.on.br/DecHV.html 708503609a9SYuri Pankov 709503609a9SYuri Pankov# From Steffen Thorsen (2008-08-29): 710503609a9SYuri Pankov# As announced by the government and many newspapers in Brazil late 711503609a9SYuri Pankov# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and 712503609a9SYuri Pankov# it will end on 2009-02-15 (current rule for Brazil is fine). Based on 713503609a9SYuri Pankov# past years experience with the elections, there was a good chance that 714503609a9SYuri Pankov# the start was postponed to November, but it did not happen this year. 715503609a9SYuri Pankov# 716503609a9SYuri Pankov# It has not yet been posted to http://pcdsh01.on.br/DecHV.html 717503609a9SYuri Pankov# 718503609a9SYuri Pankov# An official page about it: 719503609a9SYuri Pankov# http://www.mme.gov.br/site/news/detail.do?newsId=16722 720503609a9SYuri Pankov# Note that this link does not always work directly, but must be accessed 721503609a9SYuri Pankov# by going to 722503609a9SYuri Pankov# http://www.mme.gov.br/first 723503609a9SYuri Pankov# 724503609a9SYuri Pankov# One example link that works directly: 725503609a9SYuri Pankov# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54 726503609a9SYuri Pankov# (Portuguese) 727503609a9SYuri Pankov# 728503609a9SYuri Pankov# We have a written a short article about it as well: 729b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/brazil-dst-2008-2009.html 730503609a9SYuri Pankov# 731503609a9SYuri Pankov# From Alexander Krivenyshev (2011-10-04): 732503609a9SYuri Pankov# State Bahia will return to Daylight savings time this year after 8 years off. 733503609a9SYuri Pankov# The announcement was made by Governor Jaques Wagner in an interview to a 734503609a9SYuri Pankov# television station in Salvador. 735503609a9SYuri Pankov 736503609a9SYuri Pankov# In Portuguese: 737503609a9SYuri Pankov# http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html 738b654b02dSYuri Pankov# https://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html 739503609a9SYuri Pankov 740503609a9SYuri Pankov# From Guilherme Bernardes Rodrigues (2011-10-07): 741503609a9SYuri Pankov# There is news in the media, however there is still no decree about it. 742503609a9SYuri Pankov# I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the 743503609a9SYuri Pankov# official agency about time in Brazil, and she confirmed that the old rule is 744503609a9SYuri Pankov# still in force. 745503609a9SYuri Pankov 746503609a9SYuri Pankov# From Guilherme Bernardes Rodrigues (2011-10-14) 747503609a9SYuri Pankov# It's official, the President signed a decree that includes Bahia in summer 748503609a9SYuri Pankov# time. 749503609a9SYuri Pankov# [ and in a second message (same day): ] 750503609a9SYuri Pankov# I found the decree. 751503609a9SYuri Pankov# 752503609a9SYuri Pankov# DECRETO No. 7.584, DE 13 DE OUTUBRO DE 2011 753503609a9SYuri Pankov# Link : 754503609a9SYuri Pankov# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6 755503609a9SYuri Pankov 756503609a9SYuri Pankov# From Kelley Cook (2012-10-16): 757503609a9SYuri Pankov# The governor of state of Bahia in Brazil announced on Thursday that 758503609a9SYuri Pankov# due to public pressure, he is reversing the DST policy they implemented 759503609a9SYuri Pankov# last year and will not be going to Summer Time on October 21st.... 760503609a9SYuri Pankov# http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia 761503609a9SYuri Pankov 762503609a9SYuri Pankov# From Rodrigo Severo (2012-10-16): 763503609a9SYuri Pankov# Tocantins state will have DST. 764b654b02dSYuri Pankov# https://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html 765503609a9SYuri Pankov 766503609a9SYuri Pankov# From Steffen Thorsen (2013-09-20): 767503609a9SYuri Pankov# Tocantins in Brazil is very likely not to observe DST from October.... 768503609a9SYuri Pankov# http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto 769503609a9SYuri Pankov# We will keep this article updated when this is confirmed: 770b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/brazil-starts-dst-2013.html 771503609a9SYuri Pankov 772503609a9SYuri Pankov# From Steffen Thorsen (2013-10-17): 773b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html 774503609a9SYuri Pankov# Senator Jorge Viana announced that Acre will change time zone on November 10. 775503609a9SYuri Pankov# He did not specify the time of the change, nor if western parts of Amazonas 776503609a9SYuri Pankov# will change as well. 777503609a9SYuri Pankov# 778503609a9SYuri Pankov# From Paul Eggert (2013-10-17): 779503609a9SYuri Pankov# For now, assume western Amazonas will change as well. 780503609a9SYuri Pankov 781f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 782503609a9SYuri Pankov# Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01) 783503609a9SYuri Pankov# Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10) 7843508b934SYuri PankovRule Brazil 1931 only - Oct 3 11:00 1:00 - 785503609a9SYuri PankovRule Brazil 1932 1933 - Apr 1 0:00 0 - 7863508b934SYuri PankovRule Brazil 1932 only - Oct 3 0:00 1:00 - 787503609a9SYuri Pankov# Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10) 788503609a9SYuri Pankov# revoked DST. 789503609a9SYuri Pankov# Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24) 790503609a9SYuri Pankov# Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13) 7913508b934SYuri PankovRule Brazil 1949 1952 - Dec 1 0:00 1:00 - 792503609a9SYuri PankovRule Brazil 1950 only - Apr 16 1:00 0 - 793503609a9SYuri PankovRule Brazil 1951 1952 - Apr 1 0:00 0 - 794503609a9SYuri Pankov# Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24) 795503609a9SYuri PankovRule Brazil 1953 only - Mar 1 0:00 0 - 796503609a9SYuri Pankov# Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30) 797503609a9SYuri Pankov# revoked DST. 798503609a9SYuri Pankov# Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18) 799503609a9SYuri Pankov# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 800503609a9SYuri Pankov# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 801503609a9SYuri Pankov# Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03) 802503609a9SYuri Pankov# extended the above decree to all of the national territory on 12-09. 8033508b934SYuri PankovRule Brazil 1963 only - Dec 9 0:00 1:00 - 804503609a9SYuri Pankov# Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25) 805503609a9SYuri Pankov# extended summer time by one day to 1964-03-01 00:00 (start of school). 806503609a9SYuri PankovRule Brazil 1964 only - Mar 1 0:00 0 - 807503609a9SYuri Pankov# Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27) 8083508b934SYuri PankovRule Brazil 1965 only - Jan 31 0:00 1:00 - 809503609a9SYuri PankovRule Brazil 1965 only - Mar 31 0:00 0 - 810503609a9SYuri Pankov# Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22) 8113508b934SYuri PankovRule Brazil 1965 only - Dec 1 0:00 1:00 - 812503609a9SYuri Pankov# Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18) 813503609a9SYuri PankovRule Brazil 1966 1968 - Mar 1 0:00 0 - 8143508b934SYuri PankovRule Brazil 1966 1967 - Nov 1 0:00 1:00 - 815503609a9SYuri Pankov# Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15) 816503609a9SYuri Pankov# revoked DST. 817503609a9SYuri Pankov# Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27) 8183508b934SYuri PankovRule Brazil 1985 only - Nov 2 0:00 1:00 - 819503609a9SYuri Pankov# Decree 92,310 (1986-01-21) 820503609a9SYuri Pankov# Decree 92,463 (1986-03-13) 821503609a9SYuri PankovRule Brazil 1986 only - Mar 15 0:00 0 - 822503609a9SYuri Pankov# Decree 93,316 (1986-10-01) 8233508b934SYuri PankovRule Brazil 1986 only - Oct 25 0:00 1:00 - 824503609a9SYuri PankovRule Brazil 1987 only - Feb 14 0:00 0 - 825503609a9SYuri Pankov# Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22) 8263508b934SYuri PankovRule Brazil 1987 only - Oct 25 0:00 1:00 - 827503609a9SYuri PankovRule Brazil 1988 only - Feb 7 0:00 0 - 828503609a9SYuri Pankov# Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12) 829503609a9SYuri Pankov# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 8303508b934SYuri PankovRule Brazil 1988 only - Oct 16 0:00 1:00 - 831503609a9SYuri PankovRule Brazil 1989 only - Jan 29 0:00 0 - 832503609a9SYuri Pankov# Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21) 833503609a9SYuri Pankov# with the same exceptions 8343508b934SYuri PankovRule Brazil 1989 only - Oct 15 0:00 1:00 - 835503609a9SYuri PankovRule Brazil 1990 only - Feb 11 0:00 0 - 836503609a9SYuri Pankov# Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17) 837503609a9SYuri Pankov# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 838503609a9SYuri Pankov# Decree 99,629 (1990-10-19) adds BA, MT. 8393508b934SYuri PankovRule Brazil 1990 only - Oct 21 0:00 1:00 - 840503609a9SYuri PankovRule Brazil 1991 only - Feb 17 0:00 0 - 841503609a9SYuri Pankov# Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25) 842503609a9SYuri Pankov# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 8433508b934SYuri PankovRule Brazil 1991 only - Oct 20 0:00 1:00 - 844503609a9SYuri PankovRule Brazil 1992 only - Feb 9 0:00 0 - 845503609a9SYuri Pankov# Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16) 846503609a9SYuri Pankov# adopted by same states. 8473508b934SYuri PankovRule Brazil 1992 only - Oct 25 0:00 1:00 - 848503609a9SYuri PankovRule Brazil 1993 only - Jan 31 0:00 0 - 849503609a9SYuri Pankov# Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28) 850503609a9SYuri Pankov# adopted by same states, plus AM. 851503609a9SYuri Pankov# Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22; 852503609a9SYuri Pankov# web page corrected 2004-01-07) adopted by same states, minus AM. 853503609a9SYuri Pankov# Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14) 854503609a9SYuri Pankov# adopted by same states, plus MT and TO. 855503609a9SYuri Pankov# Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13) 856503609a9SYuri Pankov# adds AL, SE. 8573508b934SYuri PankovRule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 - 858503609a9SYuri PankovRule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 859503609a9SYuri PankovRule Brazil 1996 only - Feb 11 0:00 0 - 860503609a9SYuri Pankov# Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04) 861503609a9SYuri Pankov# adopted by same states, minus AL, SE. 8623508b934SYuri PankovRule Brazil 1996 only - Oct 6 0:00 1:00 - 863503609a9SYuri PankovRule Brazil 1997 only - Feb 16 0:00 0 - 864503609a9SYuri Pankov# From Daniel C. Sobral (1998-02-12): 865503609a9SYuri Pankov# In 1997, the DS began on October 6. The stated reason was that 866503609a9SYuri Pankov# because international television networks ignored Brazil's policy on DS, 867503609a9SYuri Pankov# they bought the wrong times on satellite for coverage of Pope's visit. 868503609a9SYuri Pankov# This year, the ending date of DS was postponed to March 1 869503609a9SYuri Pankov# to help dealing with the shortages of electric power. 870503609a9SYuri Pankov# 871503609a9SYuri Pankov# Decree 2,317 (1997-09-04), adopted by same states. 8723508b934SYuri PankovRule Brazil 1997 only - Oct 6 0:00 1:00 - 873503609a9SYuri Pankov# Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG> 874503609a9SYuri Pankov# (1998-02-10) 875503609a9SYuri PankovRule Brazil 1998 only - Mar 1 0:00 0 - 876503609a9SYuri Pankov# Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11) 877503609a9SYuri Pankov# adopted by the same states as before. 8783508b934SYuri PankovRule Brazil 1998 only - Oct 11 0:00 1:00 - 879503609a9SYuri PankovRule Brazil 1999 only - Feb 21 0:00 0 - 880503609a9SYuri Pankov# Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif> 881503609a9SYuri Pankov# (1999-08-23) adopted by same states. 882503609a9SYuri Pankov# Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30) 883503609a9SYuri Pankov# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 8843508b934SYuri PankovRule Brazil 1999 only - Oct 3 0:00 1:00 - 885503609a9SYuri PankovRule Brazil 2000 only - Feb 27 0:00 0 - 886503609a9SYuri Pankov# Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06) 887503609a9SYuri Pankov# adopted by the same states as before. 888503609a9SYuri Pankov# Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13) 889503609a9SYuri Pankov# repeals DST in PE and RR, effective 2000-10-15 00:00. 890503609a9SYuri Pankov# Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17) 891503609a9SYuri Pankov# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 892503609a9SYuri Pankov# Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif> 893503609a9SYuri Pankov# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 8943508b934SYuri PankovRule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 - 895503609a9SYuri PankovRule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - 896503609a9SYuri Pankov# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 897503609a9SYuri Pankov# 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm> 8983508b934SYuri PankovRule Brazil 2002 only - Nov 3 0:00 1:00 - 899503609a9SYuri Pankov# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 900503609a9SYuri Pankov# 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm> 9013508b934SYuri PankovRule Brazil 2003 only - Oct 19 0:00 1:00 - 902503609a9SYuri Pankov# Decree 5,223 (2004-10-01) reestablishes DST in MT. 903503609a9SYuri Pankov# 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm> 9043508b934SYuri PankovRule Brazil 2004 only - Nov 2 0:00 1:00 - 905503609a9SYuri Pankov# Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19), 906503609a9SYuri Pankov# adopted by the same states as before. 9073508b934SYuri PankovRule Brazil 2005 only - Oct 16 0:00 1:00 - 908503609a9SYuri Pankov# Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03), 909503609a9SYuri Pankov# adopted by the same states as before. 9103508b934SYuri PankovRule Brazil 2006 only - Nov 5 0:00 1:00 - 911503609a9SYuri PankovRule Brazil 2007 only - Feb 25 0:00 0 - 912503609a9SYuri Pankov# Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26), 913503609a9SYuri Pankov# adopted by the same states as before. 9143508b934SYuri PankovRule Brazil 2007 only - Oct Sun>=8 0:00 1:00 - 915503609a9SYuri Pankov# From Frederico A. C. Neves (2008-09-10): 916503609a9SYuri Pankov# According to this decree 917503609a9SYuri Pankov# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm 918503609a9SYuri Pankov# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the 919503609a9SYuri Pankov# 3rd Feb Sunday. There is an exception on the return date when this is 920503609a9SYuri Pankov# the Carnival Sunday then the return date will be the next Sunday... 9213508b934SYuri PankovRule Brazil 2008 2017 - Oct Sun>=15 0:00 1:00 - 922503609a9SYuri PankovRule Brazil 2008 2011 - Feb Sun>=15 0:00 0 - 9234b8ee424SYuri Pankov# Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13) 9244b8ee424SYuri Pankov# added Bahia. 925503609a9SYuri PankovRule Brazil 2012 only - Feb Sun>=22 0:00 0 - 9264b8ee424SYuri Pankov# Decree 7,826 <http://pcdsh01.on.br/HVdecreto7826_20121015.jpg> (2012-10-15) 9274b8ee424SYuri Pankov# removed Bahia and added Tocantins. 9284b8ee424SYuri Pankov# Decree 8,112 <http://pcdsh01.on.br/HVdecreto8112_20130930.JPG> (2013-09-30) 9294b8ee424SYuri Pankov# removed Tocantins. 930503609a9SYuri PankovRule Brazil 2013 2014 - Feb Sun>=15 0:00 0 - 931503609a9SYuri PankovRule Brazil 2015 only - Feb Sun>=22 0:00 0 - 932374df668SAndy FiddamanRule Brazil 2016 2019 - Feb Sun>=15 0:00 0 - 9334b8ee424SYuri Pankov# From Steffen Thorsen (2017-12-18): 9344b8ee424SYuri Pankov# According to many media sources, next year's DST start in Brazil will move to 935374df668SAndy Fiddaman# the first Sunday of November 9364b8ee424SYuri Pankov# ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html 9374b8ee424SYuri Pankov# From Steffen Thorsen (2017-12-20): 9384b8ee424SYuri Pankov# http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm 93905e627dcSAndy Fiddaman# From Fábio Gomes (2018-10-04): 94005e627dcSAndy Fiddaman# The Brazilian president just announced a new change on this year DST. 94105e627dcSAndy Fiddaman# It was scheduled to start on November 4th and it was changed to November 18th. 94205e627dcSAndy Fiddaman# From Rodrigo Brüning Wessler (2018-10-15): 94305e627dcSAndy Fiddaman# The Brazilian government just announced that the change in DST was 94405e627dcSAndy Fiddaman# canceled.... Maybe the president Michel Temer also woke up one hour 94505e627dcSAndy Fiddaman# earlier today. :) 946374df668SAndy FiddamanRule Brazil 2018 only - Nov Sun>=1 0:00 1:00 - 947374df668SAndy Fiddaman# The last ruleset listed above says that the following states observed DST: 948503609a9SYuri Pankov# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 949374df668SAndy Fiddaman# 950374df668SAndy Fiddaman# From Steffen Thorsen (2019-04-05): 951374df668SAndy Fiddaman# According to multiple sources the Brazilian president wants to get rid of DST. 952374df668SAndy Fiddaman# https://gmconline.com.br/noticias/politica/bolsonaro-horario-de-verao-deve-acabar-este-ano 953374df668SAndy Fiddaman# https://g1.globo.com/economia/noticia/2019/04/05/governo-anuncia-fim-do-horario-de-verao.ghtml 954374df668SAndy Fiddaman# From Marcus Diniz (2019-04-25): 955374df668SAndy Fiddaman# Brazil no longer has DST changes - decree signed today 956374df668SAndy Fiddaman# https://g1.globo.com/politica/noticia/2019/04/25/bolsonaro-assina-decreto-que-acaba-com-o-horario-de-verao.ghtml 957374df668SAndy Fiddaman# From Daniel Soares de Oliveira (2019-04-26): 958374df668SAndy Fiddaman# http://www.planalto.gov.br/ccivil_03/_Ato2019-2022/2019/Decreto/D9772.htm 959503609a9SYuri Pankov 960374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 961503609a9SYuri Pankov# 962503609a9SYuri Pankov# Fernando de Noronha (administratively part of PE) 963503609a9SYuri PankovZone America/Noronha -2:09:40 - LMT 1914 964dafc4501SDan McDonald -2:00 Brazil -02/-01 1990 Sep 17 965dafc4501SDan McDonald -2:00 - -02 1999 Sep 30 966dafc4501SDan McDonald -2:00 Brazil -02/-01 2000 Oct 15 967dafc4501SDan McDonald -2:00 - -02 2001 Sep 13 968dafc4501SDan McDonald -2:00 Brazil -02/-01 2002 Oct 1 969dafc4501SDan McDonald -2:00 - -02 970503609a9SYuri Pankov# Other Atlantic islands have no permanent settlement. 971503609a9SYuri Pankov# These include Trindade and Martim Vaz (administratively part of ES), 972503609a9SYuri Pankov# Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE). 973503609a9SYuri Pankov# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 974503609a9SYuri Pankov# it also included the Penedos. 975503609a9SYuri Pankov# 976503609a9SYuri Pankov# Amapá (AP), east Pará (PA) 977503609a9SYuri Pankov# East Pará includes Belém, Marabá, Serra Norte, and São Félix do Xingu. 978503609a9SYuri Pankov# The division between east and west Pará is the river Xingu. 979503609a9SYuri Pankov# In the north a very small part from the river Javary (now Jari I guess, 980503609a9SYuri Pankov# the border with Amapá) to the Amazon, then to the Xingu. 981503609a9SYuri PankovZone America/Belem -3:13:56 - LMT 1914 982dafc4501SDan McDonald -3:00 Brazil -03/-02 1988 Sep 12 983dafc4501SDan McDonald -3:00 - -03 984503609a9SYuri Pankov# 985503609a9SYuri Pankov# west Pará (PA) 986503609a9SYuri Pankov# West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém. 987503609a9SYuri PankovZone America/Santarem -3:38:48 - LMT 1914 988dafc4501SDan McDonald -4:00 Brazil -04/-03 1988 Sep 12 989dafc4501SDan McDonald -4:00 - -04 2008 Jun 24 0:00 990dafc4501SDan McDonald -3:00 - -03 991503609a9SYuri Pankov# 992503609a9SYuri Pankov# Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN), 993503609a9SYuri Pankov# Paraíba (PB) 994503609a9SYuri PankovZone America/Fortaleza -2:34:00 - LMT 1914 995dafc4501SDan McDonald -3:00 Brazil -03/-02 1990 Sep 17 996dafc4501SDan McDonald -3:00 - -03 1999 Sep 30 997dafc4501SDan McDonald -3:00 Brazil -03/-02 2000 Oct 22 998dafc4501SDan McDonald -3:00 - -03 2001 Sep 13 999dafc4501SDan McDonald -3:00 Brazil -03/-02 2002 Oct 1 1000dafc4501SDan McDonald -3:00 - -03 1001503609a9SYuri Pankov# 1002503609a9SYuri Pankov# Pernambuco (PE) (except Atlantic islands) 1003503609a9SYuri PankovZone America/Recife -2:19:36 - LMT 1914 1004dafc4501SDan McDonald -3:00 Brazil -03/-02 1990 Sep 17 1005dafc4501SDan McDonald -3:00 - -03 1999 Sep 30 1006dafc4501SDan McDonald -3:00 Brazil -03/-02 2000 Oct 15 1007dafc4501SDan McDonald -3:00 - -03 2001 Sep 13 1008dafc4501SDan McDonald -3:00 Brazil -03/-02 2002 Oct 1 1009dafc4501SDan McDonald -3:00 - -03 1010503609a9SYuri Pankov# 1011503609a9SYuri Pankov# Tocantins (TO) 1012503609a9SYuri PankovZone America/Araguaina -3:12:48 - LMT 1914 1013dafc4501SDan McDonald -3:00 Brazil -03/-02 1990 Sep 17 1014dafc4501SDan McDonald -3:00 - -03 1995 Sep 14 1015dafc4501SDan McDonald -3:00 Brazil -03/-02 2003 Sep 24 1016dafc4501SDan McDonald -3:00 - -03 2012 Oct 21 1017dafc4501SDan McDonald -3:00 Brazil -03/-02 2013 Sep 1018dafc4501SDan McDonald -3:00 - -03 1019503609a9SYuri Pankov# 1020503609a9SYuri Pankov# Alagoas (AL), Sergipe (SE) 1021503609a9SYuri PankovZone America/Maceio -2:22:52 - LMT 1914 1022dafc4501SDan McDonald -3:00 Brazil -03/-02 1990 Sep 17 1023dafc4501SDan McDonald -3:00 - -03 1995 Oct 13 1024dafc4501SDan McDonald -3:00 Brazil -03/-02 1996 Sep 4 1025dafc4501SDan McDonald -3:00 - -03 1999 Sep 30 1026dafc4501SDan McDonald -3:00 Brazil -03/-02 2000 Oct 22 1027dafc4501SDan McDonald -3:00 - -03 2001 Sep 13 1028dafc4501SDan McDonald -3:00 Brazil -03/-02 2002 Oct 1 1029dafc4501SDan McDonald -3:00 - -03 1030503609a9SYuri Pankov# 1031503609a9SYuri Pankov# Bahia (BA) 1032503609a9SYuri Pankov# There are too many Salvadors elsewhere, so use America/Bahia instead 1033503609a9SYuri Pankov# of America/Salvador. 1034503609a9SYuri PankovZone America/Bahia -2:34:04 - LMT 1914 1035dafc4501SDan McDonald -3:00 Brazil -03/-02 2003 Sep 24 1036dafc4501SDan McDonald -3:00 - -03 2011 Oct 16 1037dafc4501SDan McDonald -3:00 Brazil -03/-02 2012 Oct 21 1038dafc4501SDan McDonald -3:00 - -03 1039503609a9SYuri Pankov# 1040503609a9SYuri Pankov# Goiás (GO), Distrito Federal (DF), Minas Gerais (MG), 1041503609a9SYuri Pankov# Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR), 1042503609a9SYuri Pankov# Santa Catarina (SC), Rio Grande do Sul (RS) 1043503609a9SYuri PankovZone America/Sao_Paulo -3:06:28 - LMT 1914 1044dafc4501SDan McDonald -3:00 Brazil -03/-02 1963 Oct 23 0:00 1045dafc4501SDan McDonald -3:00 1:00 -02 1964 1046dafc4501SDan McDonald -3:00 Brazil -03/-02 1047503609a9SYuri Pankov# 1048503609a9SYuri Pankov# Mato Grosso do Sul (MS) 1049503609a9SYuri PankovZone America/Campo_Grande -3:38:28 - LMT 1914 1050dafc4501SDan McDonald -4:00 Brazil -04/-03 1051503609a9SYuri Pankov# 1052503609a9SYuri Pankov# Mato Grosso (MT) 1053503609a9SYuri PankovZone America/Cuiaba -3:44:20 - LMT 1914 1054dafc4501SDan McDonald -4:00 Brazil -04/-03 2003 Sep 24 1055dafc4501SDan McDonald -4:00 - -04 2004 Oct 1 1056dafc4501SDan McDonald -4:00 Brazil -04/-03 1057503609a9SYuri Pankov# 1058503609a9SYuri Pankov# Rondônia (RO) 1059503609a9SYuri PankovZone America/Porto_Velho -4:15:36 - LMT 1914 1060dafc4501SDan McDonald -4:00 Brazil -04/-03 1988 Sep 12 1061dafc4501SDan McDonald -4:00 - -04 1062503609a9SYuri Pankov# 1063503609a9SYuri Pankov# Roraima (RR) 1064503609a9SYuri PankovZone America/Boa_Vista -4:02:40 - LMT 1914 1065dafc4501SDan McDonald -4:00 Brazil -04/-03 1988 Sep 12 1066dafc4501SDan McDonald -4:00 - -04 1999 Sep 30 1067dafc4501SDan McDonald -4:00 Brazil -04/-03 2000 Oct 15 1068dafc4501SDan McDonald -4:00 - -04 1069503609a9SYuri Pankov# 1070503609a9SYuri Pankov# east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto 1071503609a9SYuri Pankov# The great circle line from Tabatinga to Porto Acre divides 1072503609a9SYuri Pankov# east from west Amazonas. 1073503609a9SYuri PankovZone America/Manaus -4:00:04 - LMT 1914 1074dafc4501SDan McDonald -4:00 Brazil -04/-03 1988 Sep 12 1075dafc4501SDan McDonald -4:00 - -04 1993 Sep 28 1076dafc4501SDan McDonald -4:00 Brazil -04/-03 1994 Sep 22 1077dafc4501SDan McDonald -4:00 - -04 1078503609a9SYuri Pankov# 1079503609a9SYuri Pankov# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 1080503609a9SYuri Pankov# Eirunepé, Envira, Ipixuna 1081503609a9SYuri PankovZone America/Eirunepe -4:39:28 - LMT 1914 1082dafc4501SDan McDonald -5:00 Brazil -05/-04 1988 Sep 12 1083dafc4501SDan McDonald -5:00 - -05 1993 Sep 28 1084dafc4501SDan McDonald -5:00 Brazil -05/-04 1994 Sep 22 1085dafc4501SDan McDonald -5:00 - -05 2008 Jun 24 0:00 1086dafc4501SDan McDonald -4:00 - -04 2013 Nov 10 1087dafc4501SDan McDonald -5:00 - -05 1088503609a9SYuri Pankov# 1089503609a9SYuri Pankov# Acre (AC) 1090503609a9SYuri PankovZone America/Rio_Branco -4:31:12 - LMT 1914 1091dafc4501SDan McDonald -5:00 Brazil -05/-04 1988 Sep 12 1092dafc4501SDan McDonald -5:00 - -05 2008 Jun 24 0:00 1093dafc4501SDan McDonald -4:00 - -04 2013 Nov 10 1094dafc4501SDan McDonald -5:00 - -05 1095503609a9SYuri Pankov 1096503609a9SYuri Pankov# Chile 1097503609a9SYuri Pankov 10982de2fd87SAndy Fiddaman# From Paul Eggert (2022-03-15): 1099503609a9SYuri Pankov# Shanks & Pottenger says America/Santiago introduced standard time in 11004b8ee424SYuri Pankov# 1890 and rounds its UT offset to 70W40; guess that in practice this 1101503609a9SYuri Pankov# was the same offset as in 1916-1919. It also says Pacific/Easter 1102503609a9SYuri Pankov# standardized on 109W22 in 1890; assume this didn't change the clocks. 1103503609a9SYuri Pankov# 1104503609a9SYuri Pankov# Dates for America/Santiago from 1910 to 2004 are primarily from 1105503609a9SYuri Pankov# the following source, cited by Oscar van Vlijmen (2006-10-08): 1106503609a9SYuri Pankov# [1] Chile Law 1107503609a9SYuri Pankov# http://www.webexhibits.org/daylightsaving/chile.html 1108b654b02dSYuri Pankov# This contains a copy of this official table: 1109503609a9SYuri Pankov# Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30) 1110b654b02dSYuri Pankov# https://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm 1111503609a9SYuri Pankov# [1] needs several corrections, though. 1112503609a9SYuri Pankov# 1113503609a9SYuri Pankov# The first set of corrections is from: 1114503609a9SYuri Pankov# [2] History of the Official Time of Chile 1115503609a9SYuri Pankov# http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06). See: 1116b654b02dSYuri Pankov# https://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html 1117503609a9SYuri Pankov# This is an English translation of: 1118503609a9SYuri Pankov# Historia de la hora oficial de Chile (retrieved 2012-10-24). See: 1119b654b02dSYuri Pankov# https://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm 1120503609a9SYuri Pankov# A fancier Spanish version (requiring mouse-clicking) is at: 11212de2fd87SAndy Fiddaman# http://www.horaoficial.cl/historia_hora.php 1122503609a9SYuri Pankov# Conflicts between [1] and [2] were resolved as follows: 1123503609a9SYuri Pankov# 1124503609a9SYuri Pankov# - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites 1125503609a9SYuri Pankov# Boletín No. 1, Aviso No. 1 (1910). Go with [2]. 1126503609a9SYuri Pankov# 1127503609a9SYuri Pankov# - [1] says SMT was -4:42:45, [2] says Chile's official time from 1128503609a9SYuri Pankov# 1916 to 1919 was -4:42:46.3, the meridian of Chile's National 1129503609a9SYuri Pankov# Astronomical Observatory (OAN), then located in what is now 11302de2fd87SAndy Fiddaman# Quinta Normal in Santiago. Go with [1], as this matches the meridian 11312de2fd87SAndy Fiddaman# referred to by the relevant Chilean laws to this day. 1132503609a9SYuri Pankov# 1133503609a9SYuri Pankov# - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites 1134503609a9SYuri Pankov# Boletín No. 22, Aviso No. 129/1918 (1918-08-23). Go with [2]. 1135503609a9SYuri Pankov# 1136503609a9SYuri Pankov# - [1] does not give times for transitions; assume they occur 1137503609a9SYuri Pankov# at midnight mainland time, the current common practice. However, 1138503609a9SYuri Pankov# go with [2]'s specification of 23:00 for the 1947-05-21 transition. 1139503609a9SYuri Pankov# 1140503609a9SYuri Pankov# Another correction to [1] is from Jesper Nørgaard Welen, who 1141503609a9SYuri Pankov# wrote (2006-10-08), "I think that there are some obvious mistakes in 1142503609a9SYuri Pankov# the suggested link from Oscar van Vlijmen,... for instance entry 66 1143503609a9SYuri Pankov# says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at 1144503609a9SYuri Pankov# 1990-09-15 (they should have been 1990-09-15 and 1990-09-16 1145503609a9SYuri Pankov# respectively), but anyhow it clears up some doubts too." 1146503609a9SYuri Pankov# 1147503609a9SYuri Pankov# Data for Pacific/Easter from 1910 through 1967 come from Shanks & 1148503609a9SYuri Pankov# Pottenger. After that, for lack of better info assume 1149503609a9SYuri Pankov# Pacific/Easter is always two hours behind America/Santiago; 1150503609a9SYuri Pankov# this is known to work for DST transitions starting in 2008 and 1151503609a9SYuri Pankov# may well be true for earlier transitions. 1152503609a9SYuri Pankov 1153427b4c5cSAndy Fiddaman# From Tim Parenti (2022-07-06): 11542de2fd87SAndy Fiddaman# For a brief period of roughly six weeks in 1946, DST was only observed on an 11552de2fd87SAndy Fiddaman# emergency basis in specific regions of central Chile; namely, "the national 11562de2fd87SAndy Fiddaman# territory between the provinces of Coquimbo and Concepción, inclusive". 11572de2fd87SAndy Fiddaman# This was enacted by Decree 3,891, dated 1946-07-13, and took effect 11582de2fd87SAndy Fiddaman# 1946-07-14 24:00, advancing these central regions to -03. 11592de2fd87SAndy Fiddaman# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460715/#page/1 11602de2fd87SAndy Fiddaman# The decree contemplated "[t]hat this advancement of the Official Time, even 11612de2fd87SAndy Fiddaman# though it has been proposed for the cities of Santiago and Valparaíso only, 11622de2fd87SAndy Fiddaman# must be agreed with that of other cities, due to the connection of various 11632de2fd87SAndy Fiddaman# activities that require it, such as, for example, the operation of rail 11642de2fd87SAndy Fiddaman# services". It was originally set to expire after 30 days but was extended 11652de2fd87SAndy Fiddaman# through 1946-08-31 by Decree 4,506, dated 1946-08-13. 11662de2fd87SAndy Fiddaman# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460814/#page/1 11672de2fd87SAndy Fiddaman# 11682de2fd87SAndy Fiddaman# Law Number 8,522, promulgated 1946-08-27, reunified Chilean clocks at their 11692de2fd87SAndy Fiddaman# new "Summer Time" of -04, reckoned as that of "the meridian of the 11702de2fd87SAndy Fiddaman# Astronomical Observatory of Lo Espejo, advanced by 42 minutes and 45 1171427b4c5cSAndy Fiddaman# seconds". Although this law specified the new Summer Time to start on 1 1172427b4c5cSAndy Fiddaman# September each year, a special "transitional article" started it a few days 1173427b4c5cSAndy Fiddaman# early, as soon as the law took effect. As the law was to take force "from 1174427b4c5cSAndy Fiddaman# the date of its publication in the 'Diario Oficial', which happened the 1175427b4c5cSAndy Fiddaman# following day, presume the change took place in Santiago and its environs 1176427b4c5cSAndy Fiddaman# from 24:00 -03 to 23:00 -04 on Wednesday 1946-08-28. Although this was a 1177427b4c5cSAndy Fiddaman# no-op for wall clocks in the north and south of the country, put their formal 1178427b4c5cSAndy Fiddaman# start to DST an hour later when they reached 24:00 -04. 11792de2fd87SAndy Fiddaman# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460828/#page/1 11802de2fd87SAndy Fiddaman# After a brief "Winter Time" stint at -05 beginning 1947-04-01, Law Number 11812de2fd87SAndy Fiddaman# 8,777, promulgated 1947-05-17, established year-round -04 "from 23:00 on the 11822de2fd87SAndy Fiddaman# second day after it is published in the 'Diario Oficial'." It was published 11832de2fd87SAndy Fiddaman# on Monday 1947-05-19 and so took effect from Wednesday 1947-05-21 23:00. 11842de2fd87SAndy Fiddaman# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19470519/#page/1 11852de2fd87SAndy Fiddaman 1186503609a9SYuri Pankov# From Eduardo Krell (1995-10-19): 1187503609a9SYuri Pankov# The law says to switch to DST at midnight [24:00] on the second SATURDAY 1188503609a9SYuri Pankov# of October.... The law is the same for March and October. 1189503609a9SYuri Pankov# (1998-09-29): 1190503609a9SYuri Pankov# Because of the drought this year, the government decided to go into 1191503609a9SYuri Pankov# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 1192503609a9SYuri Pankov# (unless there's another dry season next year, I guess). 1193503609a9SYuri Pankov 1194503609a9SYuri Pankov# From Julio I. Pacheco Troncoso (1999-03-18): 1195503609a9SYuri Pankov# Because of the same drought, the government decided to end DST later, 1196503609a9SYuri Pankov# on April 3, (one-time change). 1197503609a9SYuri Pankov 1198503609a9SYuri Pankov# From Germán Poo-Caamaño (2008-03-03): 1199503609a9SYuri Pankov# Due to drought, Chile extends Daylight Time in three weeks. This 1200503609a9SYuri Pankov# is one-time change (Saturday 3/29 at 24:00 for America/Santiago 1201503609a9SYuri Pankov# and Saturday 3/29 at 22:00 for Pacific/Easter) 1202503609a9SYuri Pankov# The Supreme Decree is located at 1203503609a9SYuri Pankov# http://www.shoa.cl/servicios/supremo316.pdf 1204503609a9SYuri Pankov# 1205503609a9SYuri Pankov# From José Miguel Garrido (2008-03-05): 1206503609a9SYuri Pankov# http://www.shoa.cl/noticias/2008/04hora/hora.htm 1207503609a9SYuri Pankov 1208503609a9SYuri Pankov# From Angel Chiang (2010-03-04): 1209503609a9SYuri Pankov# Subject: DST in Chile exceptionally extended to 3 April due to earthquake 1210503609a9SYuri Pankov# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098 1211503609a9SYuri Pankov# 1212503609a9SYuri Pankov# From Arthur David Olson (2010-03-06): 1213503609a9SYuri Pankov# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch. 1214503609a9SYuri Pankov 1215503609a9SYuri Pankov# From Glenn Eychaner (2011-03-28): 1216503609a9SYuri Pankov# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E} 1217503609a9SYuri Pankov# In English: 1218503609a9SYuri Pankov# Chile's clocks will go back an hour this year on the 7th of May instead 1219503609a9SYuri Pankov# of this Saturday. They will go forward again the 3rd Saturday in 1220503609a9SYuri Pankov# August, not in October as they have since 1968. 1221503609a9SYuri Pankov 1222503609a9SYuri Pankov# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23): 1223503609a9SYuri Pankov# As stated in the website of the Chilean Energy Ministry 1224503609a9SYuri Pankov# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html 1225503609a9SYuri Pankov# The Chilean Government has decided to postpone the entrance into winter time 1226503609a9SYuri Pankov# (to leave DST) from March 11 2012 to April 28th 2012.... 1227503609a9SYuri Pankov# Quote from the website communication: 1228503609a9SYuri Pankov# 1229503609a9SYuri Pankov# 6. For the year 2012, the dates of entry into winter time will be as follows: 1230503609a9SYuri Pankov# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at 1231503609a9SYuri Pankov# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00 1232503609a9SYuri Pankov# of the same day. 1233503609a9SYuri Pankov# b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is, 1234503609a9SYuri Pankov# at 23:59:59, instead of passing to 0:00, the time should be adjusted to be 1235503609a9SYuri Pankov# 01:00 on September 2. 1236503609a9SYuri Pankov 1237503609a9SYuri Pankov# From Steffen Thorsen (2013-02-15): 1238503609a9SYuri Pankov# According to several news sources, Chile has extended DST this year, 1239503609a9SYuri Pankov# they will end DST later and start DST earlier than planned. They 1240503609a9SYuri Pankov# hope to save energy. The new end date is 2013-04-28 00:00 and new 1241503609a9SYuri Pankov# start date is 2013-09-08 00:00.... 1242503609a9SYuri Pankov# http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm 1243503609a9SYuri Pankov 1244503609a9SYuri Pankov# From José Miguel Garrido (2014-02-19): 1245503609a9SYuri Pankov# Today appeared in the Diario Oficial a decree amending the time change 1246503609a9SYuri Pankov# dates to 2014. 1247503609a9SYuri Pankov# DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC) 1248503609a9SYuri Pankov# DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC) 1249503609a9SYuri Pankov# http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf 1250503609a9SYuri Pankov 1251503609a9SYuri Pankov# From Eduardo Romero Urra (2015-03-03): 1252503609a9SYuri Pankov# Today has been published officially that Chile will use the DST time 1253503609a9SYuri Pankov# permanently until March 25 of 2017 1254503609a9SYuri Pankov# http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg 1255503609a9SYuri Pankov# 1256503609a9SYuri Pankov# From Paul Eggert (2015-03-03): 1257503609a9SYuri Pankov# For now, assume that the extension will persist indefinitely. 1258503609a9SYuri Pankov 1259503609a9SYuri Pankov# From Juan Correa (2016-03-18): 1260503609a9SYuri Pankov# The decree regarding DST has been published in today's Official Gazette: 1261503609a9SYuri Pankov# http://www.diariooficial.interior.gob.cl/versiones-anteriores/do/20160318/ 1262503609a9SYuri Pankov# http://www.leychile.cl/Navegar?idNorma=1088502 1263503609a9SYuri Pankov# It does consider the second Saturday of May and August as the dates 1264503609a9SYuri Pankov# for the transition; and it lists DST dates until 2019, but I think 1265503609a9SYuri Pankov# this scheme will stick. 1266503609a9SYuri Pankov# 1267503609a9SYuri Pankov# From Paul Eggert (2016-03-18): 1268503609a9SYuri Pankov# For now, assume the pattern holds for the indefinite future. 1269503609a9SYuri Pankov# The decree says transitions occur at 24:00; in practice this appears 1270503609a9SYuri Pankov# to mean 24:00 mainland time, not 24:00 local time, so that Easter 1271503609a9SYuri Pankov# Island is always two hours behind the mainland. 1272503609a9SYuri Pankov 1273dafc4501SDan McDonald# From Juan Correa (2016-12-04): 1274dafc4501SDan McDonald# Magallanes region ... will keep DST (UTC -3) all year round.... 1275dafc4501SDan McDonald# http://www.soychile.cl/Santiago/Sociedad/2016/12/04/433428/Bachelet-firmo-el-decreto-para-establecer-un-horario-unico-para-la-Region-de-Magallanes.aspx 1276dafc4501SDan McDonald# From Deborah Goldsmith (2017-01-19): 1277dafc4501SDan McDonald# http://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf 1278dafc4501SDan McDonald 127905e627dcSAndy Fiddaman# From Juan Correa (2018-08-13): 128005e627dcSAndy Fiddaman# As of moments ago, the Ministry of Energy in Chile has announced the new 128105e627dcSAndy Fiddaman# schema for DST. ... Announcement in video (in Spanish): 128205e627dcSAndy Fiddaman# https://twitter.com/MinEnergia/status/1029000399129374720 128305e627dcSAndy Fiddaman# From Yonathan Dossow (2018-08-13): 128405e627dcSAndy Fiddaman# The video says "first Saturday of September", we all know it means Sunday at 128505e627dcSAndy Fiddaman# midnight. 128605e627dcSAndy Fiddaman# From Tim Parenti (2018-08-13): 128705e627dcSAndy Fiddaman# Translating the captions on the video at 0:44-0:55, "We want to announce as 128805e627dcSAndy Fiddaman# Government that from 2019, Winter Time will be increased to 5 months, between 128905e627dcSAndy Fiddaman# the first Saturday of April and the first Saturday of September." 129005e627dcSAndy Fiddaman# At 2:08-2:20, "The Magallanes region will maintain its current time, as 129105e627dcSAndy Fiddaman# decided by the citizens during 2017, but our Government will promote a 129205e627dcSAndy Fiddaman# regional dialogue table to gather their opinion on this matter." 129305e627dcSAndy Fiddaman# https://twitter.com/MinEnergia/status/1029009354001973248 129405e627dcSAndy Fiddaman# "We will keep the new time policy unchanged for at least the next 4 years." 129505e627dcSAndy Fiddaman# So we extend the new rules on Saturdays at 24:00 mainland time indefinitely. 1296374df668SAndy Fiddaman# From Juan Correa (2019-02-04): 1297374df668SAndy Fiddaman# http://www.diariooficial.interior.gob.cl/publicaciones/2018/11/23/42212/01/1498738.pdf 1298427b4c5cSAndy Fiddaman 1299427b4c5cSAndy Fiddaman# From Juan Correa (2022-04-02): 1300427b4c5cSAndy Fiddaman# I found there was a decree published last Thursday that will keep 1301427b4c5cSAndy Fiddaman# Magallanes region to UTC -3 "indefinitely". The decree is available at 1302427b4c5cSAndy Fiddaman# https://www.diariooficial.interior.gob.cl/publicaciones/2022/03/31/43217-B/01/2108910.pdf 1303427b4c5cSAndy Fiddaman 1304427b4c5cSAndy Fiddaman# From Juan Correa (2022-08-09): 1305427b4c5cSAndy Fiddaman# the Internal Affairs Ministry (Ministerio del Interior) informed DST 1306427b4c5cSAndy Fiddaman# for America/Santiago will start on midnight of September 11th; 1307427b4c5cSAndy Fiddaman# and will end on April 1st, 2023. Magallanes region (America/Punta_Arenas) 1308427b4c5cSAndy Fiddaman# will keep UTC -3 "indefinitely"... This is because on September 4th 1309fff4a956SAndy Fiddaman# we will have a voting whether to approve a new Constitution. 1310fff4a956SAndy Fiddaman# 1311fff4a956SAndy Fiddaman# From Eduardo Romero Urra (2022-08-17): 1312fff4a956SAndy Fiddaman# https://www.diariooficial.interior.gob.cl/publicaciones/2022/08/13/43327/01/2172567.pdf 1313fff4a956SAndy Fiddaman# 1314fff4a956SAndy Fiddaman# From Paul Eggert (2022-08-17): 1315fff4a956SAndy Fiddaman# Although the presidential decree stops at fall 2026, assume that 1316fff4a956SAndy Fiddaman# similar DST rules will continue thereafter. 131705e627dcSAndy Fiddaman 1318f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 13193508b934SYuri PankovRule Chile 1927 1931 - Sep 1 0:00 1:00 - 1320503609a9SYuri PankovRule Chile 1928 1932 - Apr 1 0:00 0 - 13213508b934SYuri PankovRule Chile 1968 only - Nov 3 4:00u 1:00 - 1322503609a9SYuri PankovRule Chile 1969 only - Mar 30 3:00u 0 - 13233508b934SYuri PankovRule Chile 1969 only - Nov 23 4:00u 1:00 - 1324503609a9SYuri PankovRule Chile 1970 only - Mar 29 3:00u 0 - 1325503609a9SYuri PankovRule Chile 1971 only - Mar 14 3:00u 0 - 13263508b934SYuri PankovRule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 - 1327503609a9SYuri PankovRule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - 13283508b934SYuri PankovRule Chile 1973 only - Sep 30 4:00u 1:00 - 13293508b934SYuri PankovRule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 - 1330503609a9SYuri PankovRule Chile 1987 only - Apr 12 3:00u 0 - 1331503609a9SYuri PankovRule Chile 1988 1990 - Mar Sun>=9 3:00u 0 - 13323508b934SYuri PankovRule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 - 13333508b934SYuri PankovRule Chile 1990 only - Sep 16 4:00u 1:00 - 1334503609a9SYuri PankovRule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - 13353508b934SYuri PankovRule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 - 1336503609a9SYuri PankovRule Chile 1997 only - Mar 30 3:00u 0 - 1337503609a9SYuri PankovRule Chile 1998 only - Mar Sun>=9 3:00u 0 - 13383508b934SYuri PankovRule Chile 1998 only - Sep 27 4:00u 1:00 - 1339503609a9SYuri PankovRule Chile 1999 only - Apr 4 3:00u 0 - 13403508b934SYuri PankovRule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 - 1341503609a9SYuri PankovRule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - 1342503609a9SYuri Pankov# N.B.: the end of March 29 in Chile is March 30 in Universal time, 1343503609a9SYuri Pankov# which is used below in specifying the transition. 1344503609a9SYuri PankovRule Chile 2008 only - Mar 30 3:00u 0 - 1345503609a9SYuri PankovRule Chile 2009 only - Mar Sun>=9 3:00u 0 - 1346503609a9SYuri PankovRule Chile 2010 only - Apr Sun>=1 3:00u 0 - 1347503609a9SYuri PankovRule Chile 2011 only - May Sun>=2 3:00u 0 - 13483508b934SYuri PankovRule Chile 2011 only - Aug Sun>=16 4:00u 1:00 - 1349503609a9SYuri PankovRule Chile 2012 2014 - Apr Sun>=23 3:00u 0 - 13503508b934SYuri PankovRule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 - 135105e627dcSAndy FiddamanRule Chile 2016 2018 - May Sun>=9 3:00u 0 - 135205e627dcSAndy FiddamanRule Chile 2016 2018 - Aug Sun>=9 4:00u 1:00 - 135305e627dcSAndy FiddamanRule Chile 2019 max - Apr Sun>=2 3:00u 0 - 1354427b4c5cSAndy FiddamanRule Chile 2019 2021 - Sep Sun>=2 4:00u 1:00 - 1355427b4c5cSAndy FiddamanRule Chile 2022 only - Sep Sun>=9 4:00u 1:00 - 1356427b4c5cSAndy FiddamanRule Chile 2023 max - Sep Sun>=2 4:00u 1:00 - 1357503609a9SYuri Pankov# IATA SSIM anomalies: (1992-02) says 1992-03-14; 1358503609a9SYuri Pankov# (1996-09) says 1998-03-08. Ignore these. 1359374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 13602de2fd87SAndy FiddamanZone America/Santiago -4:42:45 - LMT 1890 13612de2fd87SAndy Fiddaman -4:42:45 - SMT 1910 Jan 10 # Santiago Mean Time 1362dafc4501SDan McDonald -5:00 - -05 1916 Jul 1 13632de2fd87SAndy Fiddaman -4:42:45 - SMT 1918 Sep 10 1364dafc4501SDan McDonald -4:00 - -04 1919 Jul 1 13652de2fd87SAndy Fiddaman -4:42:45 - SMT 1927 Sep 1 1366dafc4501SDan McDonald -5:00 Chile -05/-04 1932 Sep 1 1367dafc4501SDan McDonald -4:00 - -04 1942 Jun 1 1368dafc4501SDan McDonald -5:00 - -05 1942 Aug 1 1369427b4c5cSAndy Fiddaman -4:00 - -04 1946 Jul 14 24:00 1370427b4c5cSAndy Fiddaman -4:00 1:00 -03 1946 Aug 28 24:00 # central CL 1371427b4c5cSAndy Fiddaman -5:00 1:00 -04 1947 Mar 31 24:00 1372dafc4501SDan McDonald -5:00 - -05 1947 May 21 23:00 1373dafc4501SDan McDonald -4:00 Chile -04/-03 1374dafc4501SDan McDonaldZone America/Punta_Arenas -4:43:40 - LMT 1890 13752de2fd87SAndy Fiddaman -4:42:45 - SMT 1910 Jan 10 1376dafc4501SDan McDonald -5:00 - -05 1916 Jul 1 13772de2fd87SAndy Fiddaman -4:42:45 - SMT 1918 Sep 10 1378dafc4501SDan McDonald -4:00 - -04 1919 Jul 1 13792de2fd87SAndy Fiddaman -4:42:45 - SMT 1927 Sep 1 1380dafc4501SDan McDonald -5:00 Chile -05/-04 1932 Sep 1 1381dafc4501SDan McDonald -4:00 - -04 1942 Jun 1 1382dafc4501SDan McDonald -5:00 - -05 1942 Aug 1 1383427b4c5cSAndy Fiddaman -4:00 - -04 1946 Aug 28 24:00 1384427b4c5cSAndy Fiddaman -5:00 1:00 -04 1947 Mar 31 24:00 1385dafc4501SDan McDonald -5:00 - -05 1947 May 21 23:00 1386dafc4501SDan McDonald -4:00 Chile -04/-03 2016 Dec 4 1387dafc4501SDan McDonald -3:00 - -03 1388503609a9SYuri PankovZone Pacific/Easter -7:17:28 - LMT 1890 1389503609a9SYuri Pankov -7:17:28 - EMT 1932 Sep # Easter Mean Time 1390dafc4501SDan McDonald -7:00 Chile -07/-06 1982 Mar 14 3:00u # Easter Time 1391dafc4501SDan McDonald -6:00 Chile -06/-05 1392503609a9SYuri Pankov# 1393503609a9SYuri Pankov# Salas y Gómez Island is uninhabited. 1394503609a9SYuri Pankov# Other Chilean locations, including Juan Fernández Is, Desventuradas Is, 1395503609a9SYuri Pankov# and Antarctic bases, are like America/Santiago. 1396503609a9SYuri Pankov 1397503609a9SYuri Pankov# Antarctic base using South American rules 1398503609a9SYuri Pankov# (See the file 'antarctica' for more.) 1399503609a9SYuri Pankov# 1400503609a9SYuri Pankov# Palmer, Anvers Island, since 1965 (moved 2 miles in 1968) 1401503609a9SYuri Pankov# 1402503609a9SYuri Pankov# From Ethan Dicks (1996-10-06): 1403503609a9SYuri Pankov# It keeps the same time as Punta Arenas, Chile, because, just like us 1404503609a9SYuri Pankov# and the South Pole, that's the other end of their supply line.... 1405503609a9SYuri Pankov# I verified with someone who was there that since 1980, 1406503609a9SYuri Pankov# Palmer has followed Chile. Prior to that, before the Falklands War, 1407503609a9SYuri Pankov# Palmer used to be supplied from Argentina. 1408503609a9SYuri Pankov# 1409374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1410503609a9SYuri PankovZone Antarctica/Palmer 0 - -00 1965 1411dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 1412dafc4501SDan McDonald -3:00 Arg -03/-02 1982 May 1413dafc4501SDan McDonald -4:00 Chile -04/-03 2016 Dec 4 1414dafc4501SDan McDonald -3:00 - -03 1415503609a9SYuri Pankov 1416503609a9SYuri Pankov# Colombia 1417503609a9SYuri Pankov 1418427b4c5cSAndy Fiddaman# Milne gives 4:56:16.4 for Bogotá time in 1899. He writes, 1419503609a9SYuri Pankov# "A variation of fifteen minutes in the public clocks of Bogota is not rare." 1420503609a9SYuri Pankov 1421af2e290bSAndy Fiddaman# From Alois Treindl (2022-11-10): 1422af2e290bSAndy Fiddaman# End of time change in Colombia 1993 ... should be 6 February 24h ... 1423af2e290bSAndy Fiddaman# DECRETO 267 DE 1993 1424af2e290bSAndy Fiddaman# https://www.suin-juriscol.gov.co/viewDocument.asp?ruta=Decretos/1061335 1425af2e290bSAndy Fiddaman 1426f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 14273508b934SYuri PankovRule CO 1992 only - May 3 0:00 1:00 - 1428af2e290bSAndy FiddamanRule CO 1993 only - Feb 6 24:00 0 - 1429374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1430427b4c5cSAndy Fiddaman #STDOFF -4:56:16.4 1431503609a9SYuri PankovZone America/Bogota -4:56:16 - LMT 1884 Mar 13 1432503609a9SYuri Pankov -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time 1433dafc4501SDan McDonald -5:00 CO -05/-04 1434503609a9SYuri Pankov# Malpelo, Providencia, San Andres 1435503609a9SYuri Pankov# no information; probably like America/Bogota 1436503609a9SYuri Pankov 1437503609a9SYuri Pankov 1438503609a9SYuri Pankov# Ecuador 1439503609a9SYuri Pankov# 1440503609a9SYuri Pankov# Milne says the Central and South American Telegraph Company used -5:24:15. 1441503609a9SYuri Pankov# 1442dafc4501SDan McDonald# From Alois Treindl (2016-12-15): 1443b654b02dSYuri Pankov# https://www.elcomercio.com/actualidad/hora-sixto-1993.html 1444dafc4501SDan McDonald# ... Whether the law applied also to Galápagos, I do not know. 1445dafc4501SDan McDonald# From Paul Eggert (2016-12-15): 1446b654b02dSYuri Pankov# https://www.elcomercio.com/afull/modificacion-husohorario-ecuador-presidentes-decreto.html 1447dafc4501SDan McDonald# This says President Sixto Durán Ballén signed decree No. 285, which 1448dafc4501SDan McDonald# established DST from 1992-11-28 to 1993-02-05; it does not give transition 1449dafc4501SDan McDonald# times. The people called it "hora de Sixto" ("Sixto hour"). The change did 1450dafc4501SDan McDonald# not go over well; a popular song "Qué hora es" by Jaime Guevara had lyrics 1451dafc4501SDan McDonald# that included "Amanecía en mitad de la noche, los guaguas iban a clase sin 1452dafc4501SDan McDonald# sol" ("It was dawning in the middle of the night, the buses went to class 1453dafc4501SDan McDonald# without sun"). Although Ballén's campaign slogan was "Ni un paso atrás" 1454dafc4501SDan McDonald# (Not one step back), the clocks went back in 1993 and the experiment was not 1455dafc4501SDan McDonald# repeated. For now, assume transitions were at 00:00 local time country-wide. 1456dafc4501SDan McDonald# 1457f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 14583508b934SYuri PankovRule Ecuador 1992 only - Nov 28 0:00 1:00 - 1459dafc4501SDan McDonaldRule Ecuador 1993 only - Feb 5 0:00 0 - 1460503609a9SYuri Pankov# 1461374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1462503609a9SYuri PankovZone America/Guayaquil -5:19:20 - LMT 1890 1463503609a9SYuri Pankov -5:14:00 - QMT 1931 # Quito Mean Time 1464dafc4501SDan McDonald -5:00 Ecuador -05/-04 1465503609a9SYuri PankovZone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 1466dafc4501SDan McDonald -5:00 - -05 1986 1467dafc4501SDan McDonald -6:00 Ecuador -06/-05 1468503609a9SYuri Pankov 1469503609a9SYuri Pankov# Falklands 1470503609a9SYuri Pankov 1471503609a9SYuri Pankov# From Paul Eggert (2006-03-22): 1472503609a9SYuri Pankov# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except 1473503609a9SYuri Pankov# the IATA gives 1996-09-08. Go with Shanks & Pottenger. 1474503609a9SYuri Pankov 1475503609a9SYuri Pankov# From Falkland Islands Government Office, London (2001-01-22) 1476503609a9SYuri Pankov# via Jesper Nørgaard: 1477503609a9SYuri Pankov# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 1478503609a9SYuri Pankov# April 2001 and advance one hour to summer time at 2 am on Sunday 2 1479503609a9SYuri Pankov# September. It is anticipated that the clocks will revert back at 2 1480503609a9SYuri Pankov# am on Sunday 21 April 2002 and advance to summer time at 2 am on 1481503609a9SYuri Pankov# Sunday 1 September. 1482503609a9SYuri Pankov 1483503609a9SYuri Pankov# From Rives McDow (2001-02-13): 1484503609a9SYuri Pankov# 1485503609a9SYuri Pankov# I have communicated several times with people there, and the last 1486503609a9SYuri Pankov# time I had communications that was helpful was in 1998. Here is 1487503609a9SYuri Pankov# what was said then: 1488503609a9SYuri Pankov# 1489503609a9SYuri Pankov# "The general rule was that Stanley used daylight saving and the Camp 1490503609a9SYuri Pankov# did not. However for various reasons many people in the Camp have 1491503609a9SYuri Pankov# started to use daylight saving (known locally as 'Stanley Time') 1492503609a9SYuri Pankov# There is no rule as to who uses daylight saving - it is a matter of 1493503609a9SYuri Pankov# personal choice and so it is impossible to draw a map showing who 1494503609a9SYuri Pankov# uses it and who does not. Any list would be out of date as soon as 1495503609a9SYuri Pankov# it was produced. This year daylight saving ended on April 18/19th 1496503609a9SYuri Pankov# and started again on September 12/13th. I do not know what the rule 1497503609a9SYuri Pankov# is, but can find out if you like. We do not change at the same time 1498503609a9SYuri Pankov# as UK or Chile." 1499503609a9SYuri Pankov# 1500503609a9SYuri Pankov# I did have in my notes that the rule was "Second Saturday in Sep at 1501503609a9SYuri Pankov# 0:00 until third Saturday in Apr at 0:00". I think that this does 1502503609a9SYuri Pankov# not agree in some cases with Shanks; is this true? 1503503609a9SYuri Pankov# 1504503609a9SYuri Pankov# Also, there is no mention in the list that some areas in the 1505503609a9SYuri Pankov# Falklands do not use DST. I have found in my communications there 1506503609a9SYuri Pankov# that these areas are on the western half of East Falkland and all of 1507503609a9SYuri Pankov# West Falkland. Stanley is the only place that consistently observes 1508503609a9SYuri Pankov# DST. Again, as in other places in the world, the farmers don't like 1509503609a9SYuri Pankov# it. West Falkland is almost entirely sheep farmers. 1510503609a9SYuri Pankov# 1511503609a9SYuri Pankov# I know one lady there that keeps a list of which farm keeps DST and 1512503609a9SYuri Pankov# which doesn't each year. She runs a shop in Stanley, and says that 1513503609a9SYuri Pankov# the list changes each year. She uses it to communicate to her 1514503609a9SYuri Pankov# customers, catching them when they are home for lunch or dinner. 1515503609a9SYuri Pankov 1516503609a9SYuri Pankov# From Paul Eggert (2001-03-05): 1517503609a9SYuri Pankov# For now, we'll just record the time in Stanley, since we have no 1518503609a9SYuri Pankov# better info. 1519503609a9SYuri Pankov 1520503609a9SYuri Pankov# From Steffen Thorsen (2011-04-01): 1521503609a9SYuri Pankov# The Falkland Islands will not turn back clocks this winter, but stay on 1522503609a9SYuri Pankov# daylight saving time. 1523503609a9SYuri Pankov# 1524503609a9SYuri Pankov# One source: 1525503609a9SYuri Pankov# http://www.falklandnews.com/public/story.cfm?get=5914&source=3 1526503609a9SYuri Pankov# 1527503609a9SYuri Pankov# We have gotten this confirmed by a clerk of the legislative assembly: 1528503609a9SYuri Pankov# Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the 1529503609a9SYuri Pankov# third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3 1530503609a9SYuri Pankov# hours) on the first Sunday of September at 0200hrs. 1531503609a9SYuri Pankov# 1532503609a9SYuri Pankov# IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands 1533503609a9SYuri Pankov# will not revert to local mean time, but clocks will remain on Summer 1534503609a9SYuri Pankov# time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term 1535503609a9SYuri Pankov# change to local time following the trial period will be notified. 1536503609a9SYuri Pankov# 1537503609a9SYuri Pankov# From Andrew Newman (2012-02-24) 1538503609a9SYuri Pankov# A letter from Justin McPhee, Chief Executive, 1539503609a9SYuri Pankov# Cable & Wireless Falkland Islands (dated 2012-02-22) 1540503609a9SYuri Pankov# states... 1541503609a9SYuri Pankov# The current Atlantic/Stanley entry under South America expects the 1542503609a9SYuri Pankov# clocks to go back to standard Falklands Time (FKT) on the 15th April. 1543503609a9SYuri Pankov# The database entry states that in 2011 Stanley was staying on fixed 1544503609a9SYuri Pankov# summer time on a trial basis only. FIG need to contact IANA and/or 1545503609a9SYuri Pankov# the maintainers of the database to inform them we're adopting 1546503609a9SYuri Pankov# the same policy this year and suggest recommendations for future years. 1547503609a9SYuri Pankov# 15483508b934SYuri Pankov# For now we will assume permanent -03 for the Falklands 1549503609a9SYuri Pankov# until advised differently (to apply for 2012 and beyond, after the 2011 1550503609a9SYuri Pankov# experiment was apparently successful.) 1551f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 15523508b934SYuri PankovRule Falk 1937 1938 - Sep lastSun 0:00 1:00 - 1553503609a9SYuri PankovRule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 15543508b934SYuri PankovRule Falk 1939 only - Oct 1 0:00 1:00 - 15553508b934SYuri PankovRule Falk 1940 1942 - Sep lastSun 0:00 1:00 - 1556503609a9SYuri PankovRule Falk 1943 only - Jan 1 0:00 0 - 15573508b934SYuri PankovRule Falk 1983 only - Sep lastSun 0:00 1:00 - 1558503609a9SYuri PankovRule Falk 1984 1985 - Apr lastSun 0:00 0 - 15593508b934SYuri PankovRule Falk 1984 only - Sep 16 0:00 1:00 - 15603508b934SYuri PankovRule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 - 1561503609a9SYuri PankovRule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 1562503609a9SYuri PankovRule Falk 2001 2010 - Apr Sun>=15 2:00 0 - 15633508b934SYuri PankovRule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 - 1564374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1565503609a9SYuri PankovZone Atlantic/Stanley -3:51:24 - LMT 1890 1566503609a9SYuri Pankov -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 1567dafc4501SDan McDonald -4:00 Falk -04/-03 1983 May 1568dafc4501SDan McDonald -3:00 Falk -03/-02 1985 Sep 15 1569dafc4501SDan McDonald -4:00 Falk -04/-03 2010 Sep 5 2:00 1570dafc4501SDan McDonald -3:00 - -03 1571503609a9SYuri Pankov 1572503609a9SYuri Pankov# French Guiana 1573*e15592c8SRobert Mustacchi# For the 1911/1912 establishment of standard time in French possessions, see: 1574*e15592c8SRobert Mustacchi# Société Française de Physique, Recueil de constantes physiques (1913), 1575*e15592c8SRobert Mustacchi# page 752, 18b. 1576374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1577*e15592c8SRobert MustacchiZone America/Cayenne -3:29:20 - LMT 1911 Jul 1 1578dafc4501SDan McDonald -4:00 - -04 1967 Oct 1579dafc4501SDan McDonald -3:00 - -03 1580503609a9SYuri Pankov 1581503609a9SYuri Pankov# Guyana 158206965442SAndy Fiddaman 158306965442SAndy Fiddaman# From P Chan (2020-11-27): 158406965442SAndy Fiddaman# https://books.google.com/books?id=5-5CAQAAMAAJ&pg=SA1-PA547 158506965442SAndy Fiddaman# The Official Gazette of British Guiana. (New Series.) Vol. XL. July to 158606965442SAndy Fiddaman# December, 1915, p 1547, lists as several notes: 158706965442SAndy Fiddaman# "Local Mean Time 3 hours 52 mins. 39 secs. slow of Greenwich Mean Time 158806965442SAndy Fiddaman# (Georgetown.) From 1st August, 1911, British Guiana Standard Mean Time 4 158906965442SAndy Fiddaman# hours slow of Greenwich Mean Time, by notice in Official Gazette on 1st July, 159006965442SAndy Fiddaman# 1911. From 1st March, 1915, British Guiana Standard Mean Time 3 hours 45 159106965442SAndy Fiddaman# mins. 0 secs. slow of Greenwich Mean Time, by notice in Official Gazette on 159206965442SAndy Fiddaman# 23rd January, 1915." 159306965442SAndy Fiddaman# 159406965442SAndy Fiddaman# https://parliament.gov.gy/documents/acts/10923-act_no._27_of_1975_-_interpretation_and_general_clauses_(amendment)_act_1975.pdf 159506965442SAndy Fiddaman# Interpretation and general clauses (Amendment) Act 1975 (Act No. 27 of 1975) 159606965442SAndy Fiddaman# [dated 1975-07-31] 159706965442SAndy Fiddaman# "This Act...shall come into operation on 1st August, 1975." 159806965442SAndy Fiddaman# "...where any expression of time occurs...the time referred to shall signify 159906965442SAndy Fiddaman# the standard time of Guyana which shall be three hours behind Greenwich Mean 160006965442SAndy Fiddaman# Time." 160106965442SAndy Fiddaman# 160206965442SAndy Fiddaman# Circular No. 10/1992 dated 1992-03-20 160306965442SAndy Fiddaman# https://dps.gov.gy/wp-content/uploads/2018/12/1992-03-20-Circular-010.pdf 160406965442SAndy Fiddaman# "...cabinet has decided that with effect from Sunday 29th March, 1992, Guyana 160506965442SAndy Fiddaman# Standard Time would be re-established at 01:00 hours by adjusting the hands 160606965442SAndy Fiddaman# of the clock back to 24:00 hours." 160706965442SAndy Fiddaman# Legislated in the Interpretation and general clauses (Amendment) Act 1992 160806965442SAndy Fiddaman# (Act No. 6 of 1992) [passed 1992-03-27, published 1992-04-18] 160906965442SAndy Fiddaman# https://parliament.gov.gy/documents/acts/5885-6_of_1992_interpretation_and_general_clauses_(amendment)_act_1992.pdf 161006965442SAndy Fiddaman 1611374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 161206965442SAndy FiddamanZone America/Guyana -3:52:39 - LMT 1911 Aug 1 # Georgetown 161306965442SAndy Fiddaman -4:00 - -04 1915 Mar 1 161406965442SAndy Fiddaman -3:45 - -0345 1975 Aug 1 161506965442SAndy Fiddaman -3:00 - -03 1992 Mar 29 1:00 1616dafc4501SDan McDonald -4:00 - -04 1617503609a9SYuri Pankov 1618503609a9SYuri Pankov# Paraguay 1619503609a9SYuri Pankov# 1620503609a9SYuri Pankov# From Paul Eggert (2006-03-22): 1621503609a9SYuri Pankov# Shanks & Pottenger say that spring transitions are 01:00 -> 02:00, 1622503609a9SYuri Pankov# and autumn transitions are 00:00 -> 23:00. Go with pre-1999 1623503609a9SYuri Pankov# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 1624503609a9SYuri Pankov# 1625503609a9SYuri Pankov# From Waldemar Villamayor-Venialbo (2013-09-20): 1626503609a9SYuri Pankov# No time of the day is established for the adjustment, so people normally 1627503609a9SYuri Pankov# adjust their clocks at 0 hour of the given dates. 1628503609a9SYuri Pankov# 1629f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 16303508b934SYuri PankovRule Para 1975 1988 - Oct 1 0:00 1:00 - 1631503609a9SYuri PankovRule Para 1975 1978 - Mar 1 0:00 0 - 1632503609a9SYuri PankovRule Para 1979 1991 - Apr 1 0:00 0 - 16333508b934SYuri PankovRule Para 1989 only - Oct 22 0:00 1:00 - 16343508b934SYuri PankovRule Para 1990 only - Oct 1 0:00 1:00 - 16353508b934SYuri PankovRule Para 1991 only - Oct 6 0:00 1:00 - 1636503609a9SYuri PankovRule Para 1992 only - Mar 1 0:00 0 - 16373508b934SYuri PankovRule Para 1992 only - Oct 5 0:00 1:00 - 1638503609a9SYuri PankovRule Para 1993 only - Mar 31 0:00 0 - 16393508b934SYuri PankovRule Para 1993 1995 - Oct 1 0:00 1:00 - 1640503609a9SYuri PankovRule Para 1994 1995 - Feb lastSun 0:00 0 - 1641503609a9SYuri PankovRule Para 1996 only - Mar 1 0:00 0 - 1642503609a9SYuri Pankov# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 1643503609a9SYuri Pankov# From Steffen Thorsen (2000-10-02): 1644503609a9SYuri Pankov# I have three independent reports that Paraguay changed to DST this Sunday 1645503609a9SYuri Pankov# (10-01). 1646503609a9SYuri Pankov# 1647503609a9SYuri Pankov# Translated by Gwillim Law (2001-02-27) from 1648503609a9SYuri Pankov# Noticias, a daily paper in Asunción, Paraguay (2000-10-01): 1649503609a9SYuri Pankov# http://www.diarionoticias.com.py/011000/nacional/naciona1.htm 1650503609a9SYuri Pankov# Starting at 0:00 today, the clock will be set forward 60 minutes, in 1651503609a9SYuri Pankov# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 1652503609a9SYuri Pankov# system has been operating for several years. Formerly there was a separate 1653503609a9SYuri Pankov# decree each year; the new law has the same effect, but permanently. Every 1654503609a9SYuri Pankov# year, the time will change on the first Sunday of October; likewise, the 1655503609a9SYuri Pankov# clock will be set back on the first Sunday of March. 1656503609a9SYuri Pankov# 16573508b934SYuri PankovRule Para 1996 2001 - Oct Sun>=1 0:00 1:00 - 1658503609a9SYuri Pankov# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. 1659503609a9SYuri PankovRule Para 1997 only - Feb lastSun 0:00 0 - 1660503609a9SYuri Pankov# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 1661503609a9SYuri Pankov# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 1662503609a9SYuri PankovRule Para 1998 2001 - Mar Sun>=1 0:00 0 - 1663503609a9SYuri Pankov# From Rives McDow (2002-02-28): 1664503609a9SYuri Pankov# A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the 1665503609a9SYuri Pankov# dst method to be from the first Sunday in September to the first Sunday in 1666503609a9SYuri Pankov# April. 1667503609a9SYuri PankovRule Para 2002 2004 - Apr Sun>=1 0:00 0 - 16683508b934SYuri PankovRule Para 2002 2003 - Sep Sun>=1 0:00 1:00 - 1669503609a9SYuri Pankov# 1670503609a9SYuri Pankov# From Jesper Nørgaard Welen (2005-01-02): 1671503609a9SYuri Pankov# There are several sources that claim that Paraguay made 1672503609a9SYuri Pankov# a timezone rule change in autumn 2004. 1673503609a9SYuri Pankov# From Steffen Thorsen (2005-01-05): 1674503609a9SYuri Pankov# Decree 1,867 (2004-03-05) 1675503609a9SYuri Pankov# From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13) 1676503609a9SYuri Pankov# http://www.presidencia.gov.py/decretos/D1867.pdf 16773508b934SYuri PankovRule Para 2004 2009 - Oct Sun>=15 0:00 1:00 - 1678503609a9SYuri PankovRule Para 2005 2009 - Mar Sun>=8 0:00 0 - 1679503609a9SYuri Pankov# From Carlos Raúl Perasso (2010-02-18): 1680503609a9SYuri Pankov# By decree number 3958 issued yesterday 1681503609a9SYuri Pankov# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf 1682503609a9SYuri Pankov# Paraguay changes its DST schedule, postponing the March rule to April and 1683503609a9SYuri Pankov# modifying the October date. The decree reads: 1684503609a9SYuri Pankov# ... 1685503609a9SYuri Pankov# Art. 1. It is hereby established that from the second Sunday of the month of 1686503609a9SYuri Pankov# April of this year (2010), the official time is to be set back 60 minutes, 1687503609a9SYuri Pankov# and that on the first Sunday of the month of October, it is to be set 1688503609a9SYuri Pankov# forward 60 minutes, in all the territory of the Paraguayan Republic. 1689503609a9SYuri Pankov# ... 16903508b934SYuri PankovRule Para 2010 max - Oct Sun>=1 0:00 1:00 - 1691503609a9SYuri PankovRule Para 2010 2012 - Apr Sun>=8 0:00 0 - 1692503609a9SYuri Pankov# 1693503609a9SYuri Pankov# From Steffen Thorsen (2013-03-07): 1694503609a9SYuri Pankov# Paraguay will end DST on 2013-03-24 00:00.... 1695503609a9SYuri Pankov# http://www.ande.gov.py/interna.php?id=1075 1696503609a9SYuri Pankov# 1697503609a9SYuri Pankov# From Carlos Raúl Perasso (2013-03-15): 1698503609a9SYuri Pankov# The change in Paraguay is now final. Decree number 10780 1699503609a9SYuri Pankov# http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf 1700503609a9SYuri Pankov# From Carlos Raúl Perasso (2014-02-28): 1701503609a9SYuri Pankov# Decree 1264 can be found at: 1702503609a9SYuri Pankov# http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf 1703b4eb54e1SRobert Mustacchi# 1704b4eb54e1SRobert Mustacchi# From Paul Eggert (2023-07-26): 1705b4eb54e1SRobert Mustacchi# Transition dates are now set by Law No. 7115, not by presidential decree. 1706b4eb54e1SRobert Mustacchi# https://www.abc.com.py/politica/2023/07/12/promulgacion-el-cambio-de-hora-sera-por-ley/ 1707b4eb54e1SRobert Mustacchi# From Carlos Raúl Perasso (2023-07-27): 1708b4eb54e1SRobert Mustacchi# http://silpy.congreso.gov.py/descarga/ley-144138 1709503609a9SYuri PankovRule Para 2013 max - Mar Sun>=22 0:00 0 - 1710503609a9SYuri Pankov 1711374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1712503609a9SYuri PankovZone America/Asuncion -3:50:40 - LMT 1890 1713503609a9SYuri Pankov -3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time 1714dafc4501SDan McDonald -4:00 - -04 1972 Oct 1715dafc4501SDan McDonald -3:00 - -03 1974 Apr 1716dafc4501SDan McDonald -4:00 Para -04/-03 1717503609a9SYuri Pankov 1718503609a9SYuri Pankov# Peru 1719503609a9SYuri Pankov# 1720503609a9SYuri Pankov# From Evelyn C. Leeper via Mark Brader (2003-10-26) 1721503609a9SYuri Pankov# <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>: 1722503609a9SYuri Pankov# When we were in Peru in 1985-1986, they apparently switched over 1723503609a9SYuri Pankov# sometime between December 29 and January 3 while we were on the Amazon. 1724503609a9SYuri Pankov# 1725503609a9SYuri Pankov# From Paul Eggert (2006-03-22): 1726503609a9SYuri Pankov# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. 1727503609a9SYuri Pankov 1728f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 17293508b934SYuri PankovRule Peru 1938 only - Jan 1 0:00 1:00 - 1730503609a9SYuri PankovRule Peru 1938 only - Apr 1 0:00 0 - 17313508b934SYuri PankovRule Peru 1938 1939 - Sep lastSun 0:00 1:00 - 1732503609a9SYuri PankovRule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 17333508b934SYuri PankovRule Peru 1986 1987 - Jan 1 0:00 1:00 - 1734503609a9SYuri PankovRule Peru 1986 1987 - Apr 1 0:00 0 - 17353508b934SYuri PankovRule Peru 1990 only - Jan 1 0:00 1:00 - 1736503609a9SYuri PankovRule Peru 1990 only - Apr 1 0:00 0 - 1737503609a9SYuri Pankov# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. 17383508b934SYuri PankovRule Peru 1994 only - Jan 1 0:00 1:00 - 1739503609a9SYuri PankovRule Peru 1994 only - Apr 1 0:00 0 - 1740374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1741503609a9SYuri PankovZone America/Lima -5:08:12 - LMT 1890 1742503609a9SYuri Pankov -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 1743dafc4501SDan McDonald -5:00 Peru -05/-04 1744503609a9SYuri Pankov 1745503609a9SYuri Pankov# South Georgia 1746374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1747503609a9SYuri PankovZone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 1748dafc4501SDan McDonald -2:00 - -02 1749503609a9SYuri Pankov 1750503609a9SYuri Pankov# South Sandwich Is 1751503609a9SYuri Pankov# uninhabited; scientific personnel have wintered 1752503609a9SYuri Pankov 1753503609a9SYuri Pankov# Suriname 1754374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1755503609a9SYuri PankovZone America/Paramaribo -3:40:40 - LMT 1911 1756503609a9SYuri Pankov -3:40:52 - PMT 1935 # Paramaribo Mean Time 1757503609a9SYuri Pankov -3:40:36 - PMT 1945 Oct # The capital moved? 1758dafc4501SDan McDonald -3:30 - -0330 1984 Oct 1759dafc4501SDan McDonald -3:00 - -03 1760503609a9SYuri Pankov 1761503609a9SYuri Pankov# Uruguay 1762503609a9SYuri Pankov# From Paul Eggert (1993-11-18): 1763503609a9SYuri Pankov# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 17643508b934SYuri Pankov# 17653508b934SYuri Pankov# From Tim Parenti (2018-02-20), per Jeremie Bonjour (2018-01-31) and Michael 17663508b934SYuri Pankov# Deckers (2018-02-20): 17673508b934SYuri Pankov# ... At least they kept good records... 17683508b934SYuri Pankov# 17693508b934SYuri Pankov# http://www.armada.mil.uy/ContenidosPDFs/sohma/web/almanaque/almanaque_2018.pdf#page=36 17703508b934SYuri Pankov# Page 36 of Almanaque 2018, published by the Oceanography, Hydrography, and 17713508b934SYuri Pankov# Meteorology Service of the Uruguayan Navy, seems to give many transitions 17723508b934SYuri Pankov# with greater clarity than we've had before. It directly references many laws 17733508b934SYuri Pankov# and decrees which are, in turn, referenced below. They can be viewed in the 17743508b934SYuri Pankov# public archives of the Diario Oficial (in Spanish) at 17753508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/ 17763508b934SYuri Pankov# 17773508b934SYuri Pankov# Ley No. 3920 of 1908-06-10 placed the determination of legal time under the 17783508b934SYuri Pankov# auspices of the National Institute for the Prediction of Time. It is unclear 17793508b934SYuri Pankov# exactly what offset was used during this period, though Ley No. 7200 of 17803508b934SYuri Pankov# 1920-04-23 used the Observatory of the National Meteorological Institute in 17813508b934SYuri Pankov# Montevideo (34° 54' 33" S, 56° 12' 45" W) as its reference meridian, 17823508b934SYuri Pankov# retarding legal time by 15 minutes 9 seconds from 1920-04-30 24:00, 17833508b934SYuri Pankov# resulting in UT-04. Assume the corresponding LMT of UT-03:44:51 (given on 17843508b934SYuri Pankov# page 725 of the Proceedings of the Second Pan-American Scientific Congress, 17853508b934SYuri Pankov# 1915-1916) was in use, and merely became official from 1908-06-10. 17863508b934SYuri Pankov# https://www.impo.com.uy/diariooficial/1908/06/18/12 17873508b934SYuri Pankov# https://www.impo.com.uy/diariooficial/1920/04/27/9 17883508b934SYuri Pankov# 17893508b934SYuri Pankov# Ley No. 7594 of 1923-06-28 specified legal time as Observatory time advanced 17903508b934SYuri Pankov# by 44 minutes 51 seconds (UT-03) "from 30 September to 31 March", and by 14 17913508b934SYuri Pankov# minutes 51 seconds (UT-03:30) "the rest of the year"; a message from the 17923508b934SYuri Pankov# National Council of Administration the same day, published directly below the 17933508b934SYuri Pankov# law in the Diario Oficial, specified the first transition to be 1923-09-30 17943508b934SYuri Pankov# 24:00. This effectively established standard time at UT-03:30 with 30 17953508b934SYuri Pankov# minutes DST. Assume transitions at 24:00 on the specified days until Ley No. 17963508b934SYuri Pankov# 7919 of 1926-03-05 ended this arrangement, repealing all "laws and other 17973508b934SYuri Pankov# provisions which oppose" it, resulting in year-round UT-03:30; a Resolución 17983508b934SYuri Pankov# of 1926-03-11 puts the final transition at 1926-03-31 24:00, the same as it 17993508b934SYuri Pankov# would have been under the previous law. 18003508b934SYuri Pankov# https://www.impo.com.uy/diariooficial/1923/07/02/2 18013508b934SYuri Pankov# https://www.impo.com.uy/diariooficial/1926/03/10/2 18023508b934SYuri Pankov# https://www.impo.com.uy/diariooficial/1926/03/18/2 18033508b934SYuri Pankov# 1804f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 18053508b934SYuri PankovRule Uruguay 1923 1925 - Oct 1 0:00 0:30 - 1806503609a9SYuri PankovRule Uruguay 1924 1926 - Apr 1 0:00 0 - 18073508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18083508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1933/10/27/6 18093508b934SYuri Pankov# 18103508b934SYuri Pankov# It appears Ley No. 9122 of 1933 was never published as such in the Diario 18113508b934SYuri Pankov# Oficial, but instead appeared as Document 26 in the Diario on Friday 18123508b934SYuri Pankov# 1933-10-27 as a decree made Monday 1933-10-23 and filed under the Ministry of 18133508b934SYuri Pankov# National Defense. It reinstituted a DST of 30 minutes (to UT-03) "from the 18143508b934SYuri Pankov# last Sunday of October...until the last Saturday of March." In accordance 18153508b934SYuri Pankov# with this provision, the first transition was explicitly specified in Article 18163508b934SYuri Pankov# 2 of the decree as Saturday 1933-10-28 at 24:00; that is, Sunday 1933-10-29 18173508b934SYuri Pankov# at 00:00. Assume transitions at 00:00 Sunday throughout. 18183508b934SYuri Pankov# 18193508b934SYuri Pankov# Departing from the matter-of-fact nature of previous timekeeping laws, the 18203508b934SYuri Pankov# 1933 decree "consider[s] the advantages of...the advance of legal time": 18213508b934SYuri Pankov# 18223508b934SYuri Pankov# "Whereas: The measure adopted by almost all nations at the time of the last 18233508b934SYuri Pankov# World War still persists in North America and Europe, precisely because of 18243508b934SYuri Pankov# the economic, hygienic, and social advantages derived from such an 18253508b934SYuri Pankov# emergency measure... 18263508b934SYuri Pankov# 18273508b934SYuri Pankov# Whereas: The advance of the legal time during the summer seasons, by 18283508b934SYuri Pankov# displacing social activity near sunrise, favors the citizen populations 18293508b934SYuri Pankov# and especially the society that creates and works..." 18303508b934SYuri Pankov# 18313508b934SYuri Pankov# It further specified that "necessary measures" be taken to ensure that 18323508b934SYuri Pankov# "public spectacles finish, in general, before [01:00]." 18333508b934SYuri PankovRule Uruguay 1933 1938 - Oct lastSun 0:00 0:30 - 18343508b934SYuri PankovRule Uruguay 1934 1941 - Mar lastSat 24:00 0 - 18353508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18363508b934SYuri Pankov# Most of the Rules below, and their contemporaneous Zone lines, have been 18373508b934SYuri Pankov# updated simply to match the Almanaque 2018. Although the document does not 18383508b934SYuri Pankov# list exact transition times, midnight transitions were already present in our 18393508b934SYuri Pankov# data here for all transitions through 2004-09, and this is both consistent 18403508b934SYuri Pankov# with prior transitions and verified in several decrees marked below between 18413508b934SYuri Pankov# 1939-09 and 2004-09, wherein the relevant text was typically of the form: 18423508b934SYuri Pankov# 18433508b934SYuri Pankov# "From 0 hours on [date], the legal time of the entire Republic will be... 18443508b934SYuri Pankov# 18453508b934SYuri Pankov# In accordance with [the preceding], on [previous date] at 24 hours, all 18463508b934SYuri Pankov# clocks throughout the Republic will be [advanced/retarded] by..." 18473508b934SYuri Pankov# 18483508b934SYuri Pankov# It is possible that there is greater specificity to be found for the Rules 18493508b934SYuri Pankov# below, but it is buried in no fewer than 40 different decrees individually 18503508b934SYuri Pankov# referenced by the Almanaque for the period from 1939-09 to 2014-09. 18513508b934SYuri Pankov# Four-fifths of these were promulgated less than two weeks before taking 18523508b934SYuri Pankov# effect; more than half within a week and none more than 5 weeks. Only the 18533508b934SYuri Pankov# handful with comments below have been checked with any thoroughness. 18543508b934SYuri PankovRule Uruguay 1939 only - Oct 1 0:00 0:30 - 18553508b934SYuri PankovRule Uruguay 1940 only - Oct 27 0:00 0:30 - 18563508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18573508b934SYuri Pankov# Decreto 1145 of the Ministry of National Defense, dated 1941-07-26, specified 18583508b934SYuri Pankov# UT-03 from Friday 1941-08-01 00:00, citing an "urgent...need to save fuel". 18593508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1941/08/04/1 18603508b934SYuri PankovRule Uruguay 1941 only - Aug 1 0:00 0:30 - 18613508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18623508b934SYuri Pankov# Decreto 1866 of the Ministry of National Defense, dated 1942-12-09, specified 18633508b934SYuri Pankov# further advancement (to UT-02:30) from Sunday 1942-12-13 24:00. Since clocks 18643508b934SYuri Pankov# never went back to UT-03:30 thereafter, this is modeled as advancing standard 18653508b934SYuri Pankov# time by 30 minutes to UT-03, while retaining 30 minutes of DST. 18663508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1942/12/16/3 18673508b934SYuri PankovRule Uruguay 1942 only - Dec 14 0:00 0:30 - 1868503609a9SYuri PankovRule Uruguay 1943 only - Mar 14 0:00 0 - 18693508b934SYuri PankovRule Uruguay 1959 only - May 24 0:00 0:30 - 1870503609a9SYuri PankovRule Uruguay 1959 only - Nov 15 0:00 0 - 18713508b934SYuri PankovRule Uruguay 1960 only - Jan 17 0:00 1:00 - 1872503609a9SYuri PankovRule Uruguay 1960 only - Mar 6 0:00 0 - 18733508b934SYuri PankovRule Uruguay 1965 only - Apr 4 0:00 1:00 - 1874503609a9SYuri PankovRule Uruguay 1965 only - Sep 26 0:00 0 - 18753508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18763508b934SYuri Pankov# Decreto 321/968 of 1968-05-25, citing emergency drought measures decreed the 18773508b934SYuri Pankov# day before, brought clocks forward 30 minutes from Monday 1968-05-27 00:00. 18783508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1968/05/30/5 18793508b934SYuri PankovRule Uruguay 1968 only - May 27 0:00 0:30 - 18803508b934SYuri PankovRule Uruguay 1968 only - Dec 1 0:00 0 - 18813508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18823508b934SYuri Pankov# Decreto 188/970 of 1970-04-23 instituted restrictions on electricity 18833508b934SYuri Pankov# consumption "as a consequence of the current rainfall regime in the country". 18843508b934SYuri Pankov# Articles 13 and 14 advanced clocks by an hour from Saturday 1970-04-25 00:00. 18853508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1970/04/29/4 18863508b934SYuri PankovRule Uruguay 1970 only - Apr 25 0:00 1:00 - 18873508b934SYuri PankovRule Uruguay 1970 only - Jun 14 0:00 0 - 18883508b934SYuri PankovRule Uruguay 1972 only - Apr 23 0:00 1:00 - 18893508b934SYuri PankovRule Uruguay 1972 only - Jul 16 0:00 0 - 18903508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18913508b934SYuri Pankov# Decreto 29/974 of 1974-01-11, citing "the international rise in the price of 18923508b934SYuri Pankov# oil", advanced clocks by 90 minutes (to UT-01:30). Decreto 163/974 of 18933508b934SYuri Pankov# 1974-03-04 returned 60 of those minutes (to UT-02:30), and the remaining 30 18943508b934SYuri Pankov# minutes followed in Decreto 679/974 of 1974-08-29. 18953508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1974/01/22/11 18963508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1974/03/14/3 18973508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1974/09/04/6 18983508b934SYuri PankovRule Uruguay 1974 only - Jan 13 0:00 1:30 - 18993508b934SYuri PankovRule Uruguay 1974 only - Mar 10 0:00 0:30 - 19003508b934SYuri PankovRule Uruguay 1974 only - Sep 1 0:00 0 - 19013508b934SYuri PankovRule Uruguay 1974 only - Dec 22 0:00 1:00 - 19023508b934SYuri PankovRule Uruguay 1975 only - Mar 30 0:00 0 - 19033508b934SYuri PankovRule Uruguay 1976 only - Dec 19 0:00 1:00 - 19043508b934SYuri PankovRule Uruguay 1977 only - Mar 6 0:00 0 - 19053508b934SYuri PankovRule Uruguay 1977 only - Dec 4 0:00 1:00 - 19063508b934SYuri PankovRule Uruguay 1978 1979 - Mar Sun>=1 0:00 0 - 19073508b934SYuri PankovRule Uruguay 1978 only - Dec 17 0:00 1:00 - 19083508b934SYuri PankovRule Uruguay 1979 only - Apr 29 0:00 1:00 - 19093508b934SYuri PankovRule Uruguay 1980 only - Mar 16 0:00 0 - 19103508b934SYuri Pankov# From Tim Parenti (2018-02-15): 19113508b934SYuri Pankov# Decreto 725/987 of 1987-12-04 cited "better use of national tourist 19123508b934SYuri Pankov# attractions" to advance clocks one hour from Monday 1987-12-14 00:00. 19133508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1988/01/25/1 19143508b934SYuri PankovRule Uruguay 1987 only - Dec 14 0:00 1:00 - 19153508b934SYuri PankovRule Uruguay 1988 only - Feb 28 0:00 0 - 19163508b934SYuri PankovRule Uruguay 1988 only - Dec 11 0:00 1:00 - 19173508b934SYuri PankovRule Uruguay 1989 only - Mar 5 0:00 0 - 19183508b934SYuri PankovRule Uruguay 1989 only - Oct 29 0:00 1:00 - 19193508b934SYuri PankovRule Uruguay 1990 only - Feb 25 0:00 0 - 19203508b934SYuri Pankov# From Tim Parenti (2018-02-15), per Paul Eggert (1999-11-04): 19213508b934SYuri Pankov# IATA agrees as below for 1990-10 through 1993-02. Per Almanaque 2018, the 19223508b934SYuri Pankov# 1992/1993 season appears to be the first in over half a century where DST 19233508b934SYuri Pankov# both began and ended pursuant to the same decree. 19243508b934SYuri PankovRule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 - 19253508b934SYuri PankovRule Uruguay 1991 1992 - Mar Sun>=1 0:00 0 - 19263508b934SYuri PankovRule Uruguay 1992 only - Oct 18 0:00 1:00 - 1927503609a9SYuri PankovRule Uruguay 1993 only - Feb 28 0:00 0 - 1928503609a9SYuri Pankov# From Eduardo Cota (2004-09-20): 1929503609a9SYuri Pankov# The Uruguayan government has decreed a change in the local time.... 19303508b934SYuri Pankov# From Tim Parenti (2018-02-15): 19313508b934SYuri Pankov# Decreto 328/004 of 2004-09-15. 19323508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/2004/09/23/documentos.pdf#page=1 19333508b934SYuri PankovRule Uruguay 2004 only - Sep 19 0:00 1:00 - 1934503609a9SYuri Pankov# From Steffen Thorsen (2005-03-11): 1935503609a9SYuri Pankov# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 1936503609a9SYuri Pankov# save energy ... it was postponed two weeks.... 19373508b934SYuri Pankov# From Tim Parenti (2018-02-15): 19383508b934SYuri Pankov# This 2005 postponement is not in Almanaque 2018. Go with the contemporaneous 19393508b934SYuri Pankov# reporting, which is confirmed by Decreto 107/005 of 2005-03-10 amending 19403508b934SYuri Pankov# Decreto 328/004: 19413508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/2005/03/15/documentos.pdf#page=1 19423508b934SYuri Pankov# The original decree specified a transition of 2005-03-12 24:00, but the new 19433508b934SYuri Pankov# one specified 2005-03-27 02:00. 1944503609a9SYuri PankovRule Uruguay 2005 only - Mar 27 2:00 0 - 1945503609a9SYuri Pankov# From Eduardo Cota (2005-09-27): 19463508b934SYuri Pankov# ...from 2005-10-09 at 02:00 local time, until 2006-03-12 at 02:00 local time, 19473508b934SYuri Pankov# official time in Uruguay will be at GMT -2. 19483508b934SYuri Pankov# From Tim Parenti (2018-02-15): 19493508b934SYuri Pankov# Decreto 318/005 of 2005-09-19. 19503508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/2005/09/23/documentos.pdf#page=1 19513508b934SYuri PankovRule Uruguay 2005 only - Oct 9 2:00 1:00 - 19523508b934SYuri PankovRule Uruguay 2006 2015 - Mar Sun>=8 2:00 0 - 19533508b934SYuri Pankov# From Tim Parenti (2018-02-15), per Jesper Nørgaard Welen (2006-09-06): 19543508b934SYuri Pankov# Decreto 311/006 of 2006-09-04 established regular DST from the first Sunday 19553508b934SYuri Pankov# of October at 02:00 through the second Sunday of March at 02:00. Almanaque 19563508b934SYuri Pankov# 2018 appears to have a few typoed dates through this period; ignore them. 19573508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/2006/09/08/documentos.pdf#page=1 19583508b934SYuri PankovRule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 - 1959503609a9SYuri Pankov# From Steffen Thorsen (2015-06-30): 1960503609a9SYuri Pankov# ... it looks like they will not be using DST the coming summer: 1961503609a9SYuri Pankov# http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787 1962503609a9SYuri Pankov# http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/ 1963503609a9SYuri Pankov# From Paul Eggert (2015-06-30): 1964503609a9SYuri Pankov# Apparently restaurateurs complained that DST caused people to go to the beach 1965503609a9SYuri Pankov# instead of out to dinner. 1966503609a9SYuri Pankov# From Pablo Camargo (2015-07-13): 1967503609a9SYuri Pankov# http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf 19683508b934SYuri Pankov# From Tim Parenti (2018-02-15): 19693508b934SYuri Pankov# Decreto 178/015 of 2015-06-29; repeals Decreto 311/006. 1970dafc4501SDan McDonald 1971dafc4501SDan McDonald# This Zone can be simplified once we assume zic %z. 19723508b934SYuri PankovZone America/Montevideo -3:44:51 - LMT 1908 Jun 10 19733508b934SYuri Pankov -3:44:51 - MMT 1920 May 1 # Montevideo MT 19743508b934SYuri Pankov -4:00 - -04 1923 Oct 1 1975dafc4501SDan McDonald -3:30 Uruguay -0330/-03 1942 Dec 14 19763508b934SYuri Pankov -3:00 Uruguay -03/-0230 1960 1977dafc4501SDan McDonald -3:00 Uruguay -03/-02 1968 19783508b934SYuri Pankov -3:00 Uruguay -03/-0230 1970 1979dafc4501SDan McDonald -3:00 Uruguay -03/-02 1974 19803508b934SYuri Pankov -3:00 Uruguay -03/-0130 1974 Mar 10 1981dafc4501SDan McDonald -3:00 Uruguay -03/-0230 1974 Dec 22 1982dafc4501SDan McDonald -3:00 Uruguay -03/-02 1983503609a9SYuri Pankov 1984503609a9SYuri Pankov# Venezuela 1985503609a9SYuri Pankov# 1986503609a9SYuri Pankov# From Paul Eggert (2015-07-28): 1987503609a9SYuri Pankov# For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533 1988503609a9SYuri Pankov# http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf 1989503609a9SYuri Pankov# 1990503609a9SYuri Pankov# From John Stainforth (2007-11-28): 1991503609a9SYuri Pankov# ... the change for Venezuela originally expected for 2007-12-31 has 1992503609a9SYuri Pankov# been brought forward to 2007-12-09. The official announcement was 1993503609a9SYuri Pankov# published today in the "Gaceta Oficial de la República Bolivariana 1994503609a9SYuri Pankov# de Venezuela, número 38.819" (official document for all laws or 1995503609a9SYuri Pankov# resolution publication) 1996503609a9SYuri Pankov# http://www.globovision.com/news.php?nid=72208 1997503609a9SYuri Pankov 1998503609a9SYuri Pankov# From Alexander Krivenyshev (2016-04-15): 1999503609a9SYuri Pankov# https://actualidad.rt.com/actualidad/204758-venezuela-modificar-huso-horario-sequia-elnino 2000503609a9SYuri Pankov# 2001503609a9SYuri Pankov# From Paul Eggert (2016-04-15): 2002503609a9SYuri Pankov# Clocks advance 30 minutes on 2016-05-01 at 02:30.... 2003503609a9SYuri Pankov# "'Venezuela's new time-zone: hours without light, hours without water, 2004503609a9SYuri Pankov# hours of presidential broadcasts, hours of lines,' quipped comedian 2005503609a9SYuri Pankov# Jean Mary Curró ...". See: Cawthorne A, Kai D. Venezuela scraps 2006503609a9SYuri Pankov# half-hour time difference set by Chavez. Reuters 2016-04-15 14:50 -0400 2007b654b02dSYuri Pankov# https://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE 2008503609a9SYuri Pankov# 2009503609a9SYuri Pankov# From Matt Johnson (2016-04-20): 2010503609a9SYuri Pankov# ... published in the official Gazette [2016-04-18], here: 2011503609a9SYuri Pankov# http://historico.tsj.gob.ve/gaceta_ext/abril/1842016/E-1842016-4551.pdf 2012503609a9SYuri Pankov 2013374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 2014503609a9SYuri PankovZone America/Caracas -4:27:44 - LMT 1890 2015503609a9SYuri Pankov -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 2016dafc4501SDan McDonald -4:30 - -0430 1965 Jan 1 0:00 2017dafc4501SDan McDonald -4:00 - -04 2007 Dec 9 3:00 2018dafc4501SDan McDonald -4:30 - -0430 2016 May 1 2:30 2019dafc4501SDan McDonald -4:00 - -04 2020